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Students will select any one article provided. The article is to be summarized on no more than 2 sides / pages and should include the following information: Research design (What they did) Research Method (How they did it) Method of analysis (how they analysed) Key theories of principles of gerontology (The Background) Key findings Implications (how does it impact the real world?) Limitations Reflection on the quality of research and contribution to academic knowledge and applicability. Fiona Crawford, NH, Phil Hanlon, Jill Muirie, and DO, who all contributed equally to the thinking that inspired this article. Funding: None. Competing interests: None declared. 1 Obesity: preventing and managing the global epidemic. Report of a WHO consultation. World Health Organization Technical Report Series 2000;894:1-253. 2 Storing up problems: the medical case for a slimmer nation. London: Royal College of Physicians of London, Royal College of Paediatrics and Child Health, and Faculty of Public Health, 2004. 3 Egger G, Swinburn B. An “ecological” approach to the obesity pandemic. BMJ 1997;315:477-80. 4 Department of Health. Choosing health: making healthier choices easier. Lon- don: Stationery Office, 2004. 5 Asp N-G, Björntorp P, Britton M, Carlsson P, Kjellström T, Marcus C, et al. Obesity — problems and interventions. Stockholm: Statens beredning för medicinsk utvärdering (The Swedish Council on Technology Assessment in Health Care), 2002. 6 Ebbeling C, Pawlak D, Ludwig D. Childhood obesity: public-health crisis, common sense cure. Lancet 2002;360:473-82. 7 Department for Transport. Transport statistics bulletin: national travel survey 2002. London: Stationery Office, 2004. 8 Peters J, Wyatt H, Donahoo W, Hill J. From instinct to intellect: the chal- lenge of maintaining healthy weight in the modern world. Obes Rev 2002;3:69-74. 9 Swinburn B, Egger G. The runaway weight gain train: too many accelera- tors, not enough brakes. BMJ 2004;329:736-9. 10 Day J. Scottish schools ban food adverts. Guardian 2003;24 Dec. http://media.guardian.co.uk/advertising/story/0,,1112620,00.html (accessed 27 Jan 2004). 11 Neroth P. Fat of the land. Lancet 2004;364:651-3. 12 World Health Organization. Diet, nutrition and the prevention of chronic dis- eases. Report of a joint WHO/FAO expert consultation. Geneva: WHO, 2003. 13 Cable News Network. Transcript of President Bush’s address to a joint session of Congress on Thursday night, Sept 20, 2001. http:// www.cnn.com/2001/US/09/20/gen.bush.transcript (accessed 27 Jan 2004). 14 Hamilton C. Growth fetish. London: Pluto, 2004. 15 Department for Transport. It’s no joke. www.cyclesense.net (accessed 10 Jun 2005). 16 Lean M. Prognosis in obesity. BMJ 2005;330:1339-40. 17 Ellaway A, Macintyre S. “5-a-day” may be harder to achieve in more deprived areas. J Epidemiol Community Health 2004;58:892. 18 Ellaway A, Macintyre S. Play areas for children. J Epidemiol Community Health 2003;57:315. (Accepted 14 October 2005) What is successful ageing and who should define it? Ann Bowling, Paul Dieppe A definition of successful ageing needs to include elements that matter to elderly people The substantial increases in life expectancy at birth achieved over the previous century, combined with medical advances, escalating health and social care costs, and higher expectations for older age, have led to inter- national interest in how to promote a healthier old age and how to age “successfully.” Changing patterns of illness in old age, with morbidity being compressed into fewer years and effective interventions to reduce disabil- ity and health risks in later life, make the goal of ageing successfully more realistic. Debate continues about whether disability has been postponed,1 although the Berlin ageing study2 and the US MacArthur study of ageing3 showed that greater longevity has resulted in fewer, not more, years of disability. A forward looking policy for older age would be a programme to promote successful ageing from middle age onwards, rather than simply aiming to support elderly people with chronic conditions. But what is successful ageing? And who should define it? Methods We discuss existing models of the constituents of successful ageing from the social, psychological, and medical sciences. We undertook a systematic literature review, searching PubMed, PsycINFO, and SocioFile (all years) for “successful ageing.” We included 170 papers presenting reviews or overviews of the topic, data from cross sectional and longitudinal surveys, and qualitative studies (full list available on request, but the main ones are listed here2–22). We also included lay definitions elicited from our own recent survey of successful ageing. What is successful ageing? The main themes emerging from the theoretical litera- ture reflected psychosocial or biomedical approaches, or combinations of these (see box). There was some overlap with lay views; although the latter were more comprehensive and multidimensional. Biomedical theories Biomedical theories define successful ageing largely in terms of the optimisation of life expectancy while mini- mising physical and mental deterioration and disability. They focus on: the absence of chronic disease and of risk Decline and fall? Goya’s Les Vieilles (“Time of the Old Women”) M U S E E D E S B E A U X -A R T S , F R A N C E /G IR A U D O N /B R ID G E M A N A R T L IB R A R Y Thoughts for today Department of Primary Care and Population Sciences, University College London, London NW3 2PF Ann Bowling professor of health services research Medical Research Council Health Services Research Collaboration, Department of Social Medicine, University of Bristol, Bristol BS8 2PR Paul Dieppe director Correspondence to: A Bowling [email protected] BMJ 2005;331:1548–51 1548 BMJ VOLUME 331 24-31 DECEMBER 2005 bmj.com factors for disease; good health; and high levels of inde- pendent physical functioning, performance, mobility, and cognitive functioning. The MacArthur studies of successful ageing, based on a three site longitudinal study of elderly US adults living in the community in 1988,3 8 are the most well known and widely published biomedical studies of successful ageing. The division of people into “diseased” and “normal” fails to recognise the large heterogeneity within these groups. To overcome this, Rowe and Kahn distinguished between “usual ageing” (normal decline in physical, social, and cognitive functioning with age, heightened by extrinsic factors) and “successful ageing” in which func- tional loss is minimised (little or no age related decrement in physiological and cognitive functioning, with extrinsic factors playing a neutral or positive role).3 They confirmed the three components of successful ageing as absence or avoidance of disease and risk factors for disease, maintenance of physical and cognitive functioning, and active engagement with life (including maintenance of autonomy and social support). Some investigators have broadened the model to include more psychosocial elements,4 although attempts to build interdisciplinary models are still rare. Rowe and Kahn’s model is the most widely used approach, but it fails to address the implications of the fact that a disease-free older age is unrealistic for most people. Moreover, it has been reported that, although half of elderly people can be categorised as having aged successfully in terms of their own criteria, fewer than a fifth can be so categorised with this traditional medical model.9 Psychosocial approaches While the biomedical model emphasises absence of disease and the maintenance of physical and mental functioning as the keys to ageing successfully, socio- psychological models emphasise life satisfaction, social participation and functioning, and psychological resources, including personal growth. Satisfaction with one’s past and present life has been the most commonly proposed definition of successful ageing, and is also the most commonly investigated.15 Its components include zest, resolution and fortitude, happiness, relationships between desired and achieved goals, self concept, morale, mood, and overall wellbeing. Continued social functioning is another commonly proposed domain of successful ageing. It encompasses high levels of ability in social role functioning, positive interactions or relationships with others, social integration, and reciprocal participa- tion in society.16 Suggested psychological resources for successful ageing include a positive outlook and self worth, self efficacy or sense of control over life, autonomy and independence, and effective coping and adaptive strat- egies in the face of changing circumstances. For exam- ple, when some activities are curtailed (say, because of ill health) strategies need to be activated to find new activities and to maximise one’s reserves.17 Successful ageing is seen as a dynamic process, as the outcome of one’s development over the life course,18 and as the ability to grow and learn by using past experiences to cope with present circumstances while maintaining a realistic sense of self. Lay views There are a few investigations into older people’s views of what is successful ageing.19 Their definitions include mental, psychological, physical, and social health; func- tioning and resources; life satisfaction; having a sense of purpose; financial security; learning new things; accomplishments; physical appearance; productivity; contribution to life; sense of humour; and spirituality. The box lists several lay definitions that are not captured adequately by theoretical models. We also conducted a national, random population survey of perceptions of successful ageing among 854 people aged 50 or more, living at home in Britain; this was part of an Office for National Statistics omnibus survey (analyses ongoing). Of these people, 75\% (631) rated themselves as ageing successfully “Very well” or “Well” (as opposed to “Alright,” “Not well” or “Not very well”). The most commonly mentioned definition of successful ageing, in response to open ended question- ing, was having good health and functioning, but these were rarely mentioned in isolation, and most people mentioned more than one definition (see figure). Typi- cal comments were: “[Successful ageing is to] go out a lot and enjoy life, take it day by day, and enjoy what you can . . . Have good health—that’s more important than anything else. Keep active—while your legs are moving get out on them.” “[It’s] good health. Well, if you’re fit and able to do more . . . active . . . you . . . contribute to society and get actively involved.” “It’s your outlook on life to start with. I think I have been an active person. It’s your whole outlook. Do you make an effort to keep fit? I don’t think about getting old. I just don’t feel old and act accordingly.” Main constituents of successful ageing Theoretical definitions • Life expectancy • Life satisfaction and wellbeing (includes happiness and contentment) • Mental and psychological health, cognitive function • Personal growth, learning new things • Physical health and functioning, independent functioning • Psychological characteristics and resources, including perceived autonomy, control, independence, adaptability, coping, self esteem, positive outlook, goals, sense of self • Social, community, leisure activities, integration and participation • Social networks, support, participation, activity Additional lay definitions • Accomplishments • Enjoyment of diet • Financial security • Neighbourhood • Physical appearance • Productivity and contribution to life • Sense of humour • Sense of purpose • Spirituality Thoughts for today 1549BMJ VOLUME 331 24-31 DECEMBER 2005 bmj.com Less commonly, successful ageing was defined in terms of social capital, as retiring in a safe neighbourhood, and with good community facilities. Policy implications Several policy implications become evident from a broader interpretation of the concept of successful ageing. Biomedical research has developed to include the investigation of biological pathways to unsuccessful ageing (impaired mental and physical functioning, including immunological and genetic markers), although the current policy focus is on disease preven- tion and health promotion for achieving successful ageing. Most behavioural actions for successful ageing continue to promote health related behaviours and engagement in cognitively stimulating activities. Indeed, on the basis of the Landmark Harvard study of adult development, Vaillant argued that successful age- ing is less dependent upon genetic predisposition than previously thought.4 If high social functioning, for example, is accepted as part of ageing successfully, the implication is that people need encouragement to build up their social activities and networks from a young age, and the pro- vision of enabling community facilities is needed. This is given impetus by research indicating that many domains of successful ageing are inter-related, and that having multiple social activities and relationships is associated with life satisfaction and better health and functioning, autonomy, and survival.4 20 Psychosocial models have also culminated in the positive psychology movement, with its proponents of the benefits of learnt optimism.23 It has been postulated that people can learn to see “a bottle half full” instead of “a bottle half empty” and that having a happy outlook is a skill that can be cultivated. But, irrespective of the likelihood of genetic influences, getting people to “cheer up” is not always easy in real life. With greater recognition that older people are not a homogeneous group, health professionals need more balanced, interdisciplinary perspectives of older age. People’s low expectations of ageing are associated with their placing less importance on seeking health care.21 Clinicians need to be aware of their patients’ val- ues and expectations of ageing in order to enhance mutual understanding of their health goals and priori- ties,19 and to consider interventions that will optimise their chances of “ageing successfully” in their terms. However, interventions need to target potentially vulnerable groups early on, as several longitudinal datasets have shown that variables measured in middle age predict outcomes in old age.4 Consistent with this are longitudinal data showing that adaptation to old age is related to experiences of stressful events, and is also associated with social class.24 Conclusions Most concepts of successful ageing are used uncriti- cally and tend to reflect the academic discipline of the investigator. Many authors have also confused constitu- ents with precursors. While the biomedical models emphasised absence of disease and good physical and mental functioning as successful ageing, sociopsycho- logical models emphasised life satisfaction, social func- tioning and participation, or psychological resources. Lay views of successful ageing are important for testing the validity of existing models and measures, if they are to have any relevance to the population they are applied to. There is little point in developing policy goals if elderly people do not regard them as relevant. Most health care provided in the developed world goes to those aged 65 years or above. The medical model is so dominant that few health professionals are aware of psychosocial ageing. The result is a focus on the burden of old age, the decline and failure of the body. This negative perspective inevitably dominates consultations between doctors and patients. However, there is ample evidence that many elderly people regard themselves as happy and well, even in the pres- ence of disease or disability. Doctors should be aware that many elderly people consider themselves to have aged successfully, whereas classifications based on traditional medical models do not. This review led us to a paper by Callahan et al,22 who suggested that we need to examine our assumptions and adopt humility of perspective. Health professionals need to respect the values and attitudes of each elderly person who asks for help, rather than imposing our medical model on to their lives. In conclusion, the achievement of successful ageing in terms of all the criteria presented here is unrealistic for most people. But successful ageing needs to be viewed, not only multidimensionally, but as an ideal state to be aimed for, and the concept itself should be placed on a continuum of achievement rather than subject to simplistic normative assessments of success or failure. Given the enormous body of ongoing research on the topic, it would be unhelpful to abandon the term altogether; the adoption of a broader perspective will have relevance for elderly people themselves. We thank Sandra Short, Ian O’Sullivan and the Office for National Statistics (ONS) staff who carried out the original Omnibus Survey data analysis and collection. They hold no responsibility for the further analysis and interpretation of them. Material from the ONS Omnibus Survey, made available through ONS, has been used with the permission of the controller of the Stationery Office. The dataset will be held on the data archive at the University of Essex. R es po nd en ts g iv in g de fin iti on ( \% ) He alt h 0 20 30 40 50 60 70 10 Ps yc ho log ica l fa cto rs So cia l r ole s a nd ac tiv itie s Fin an ce s So cia l r ela tio ns hip s Ne igh bo ur ho od Most common definitions of successful ageing given by 854 people aged ≥50 in Britain Thoughts for today 1550 BMJ VOLUME 331 24-31 DECEMBER 2005 bmj.com Contributors: AB undertook the systematic review and analyses and is guarantor for the study. AB and PD wrote this article col- laboratively. Funding: None. Competing interests: None declared. Ethical approval: Not required. 1 Mor V. The compression of morbidity hypothesis: a review of research and prospects for the future. J Am Geriatr Soc 2005;53:S308-9. 2 Baltes PB, Mayer KV, eds. The Berlin ageing study. Cambridge: Cambridge University Press, 1999. 3 Rowe JW, Kahn RL. Successful aging. New York: Pantheon Books, 1998. 4 Vaillant GE. Aging well: surprising guideposts to a happier life from the Land- mark Harvard study of adult development. Boston: Little Brown, 2002. 5 Roos NP, Havens B. Predictors of successful aging: a twelve year study of Manitoba elderly. Am J Public Health 1991;81:63-8. 6 Crosnoe R, Elder GH. Successful adaptation in the later years: a life course approach to aging. Soc Psychol Q 2002;65:309-28. 7 Andrews G, Clark M, Luszcz M. Successful aging in the Australian longi- tudinal study of aging: applying the MacArthur model cross-nationally. J Soc Issues 2002;58:749-65. 8 Seeman TE, Charpentier PA, Berkman LF, Tinetti ME, Guralnik JM, Albert M, et al. Predicting changes in physical performance in a high-functioning elderly cohort. MacArthur studies of successful aging. J Gerontol 1994;49:M97-108. 9 Strawbridge WJ, Wallhagen MI, Cohen RD. Successful aging and well-being. Self-rated compared with Rowe and Kahn. Gerontologist 2002;42:727-33. 10 Vaillant GE, Mukamal K. Successful aging. Am J Psychiatry 2001;158: 839-47. 11 Von Faber M. Successful aging in the oldest old: who can be characterised as successfully aged? Arch Intern Med 2001;161:2694-700. 12 Grundy E, Bowling A. Enhancing the quality of extended life years. Iden- tification of the oldest old with a very good and very poor quality of life. Aging Ment Health 1999;3:199-212. 13 Palmore E. Predictors of successful aging. Gerontologist 1979;19:427-31. 14 Williams RH, Wirths CG. Lives through the years: styles of life and successful aging. New York: Atherton Press, 1965. 15 Havighurst RJ. Successful aging. In: Williams RH, Tibbits C, Donahue W, eds. Processes of aging. New York: Atherton Press, 1963:299-320. 16 Havighurst RL, Neugarten B, Tobin SS. Disengagement and patterns of aging. In: Neugarten BL, ed. Middle age and aging: a reader in social psychol- ogy. Chicago: University of Chicago Press, 1968:161-72. 17 Baltes PB, Baltes MM. Successful aging: perspectives from the behavioral sciences. New York: Cambridge University Press, 1990. 18 Ryff CD. Beyond Ponce de Leon and life satisfaction: new directions in quest of successful aging. Int J Behav Dev 1989;12:35-55. 19 Phelan EA, Anderson LA, Lacroix AZ, Larson EB. Older adults’ views of “successful aging”—how do they compare with researchers’ definitions? J Am Geriatr Soc 2004;52:211-6. 20 Menec VH. The relation between everyday activities and successful aging: a 6-year longitudinal study. J Gerontol B Psychol Sci Soc Sci 2003;58:S74-82. 21 Sarkisian CA, Hays RD, Mangione CM. Do older adults expect to age successfully? The associations between expectations regarding aging and beliefs regarding healthcare seeking among older adults. J Am Geriatr Soc 2002;50:1837-43. 22 Callahan CM, McHorney CA, Mulrow CD. Successful aging and the humility of perspective. Ann Intern Med 2003;139:389-90. 23 Seligman M. Authentic happiness: using the new potential for lasting fulfilment. New York: Free Press, 2004. 24 Caspi A, Elden GH. Life satisfaction in old age: linking social psychology and history. Psychol Aging 1986;1:18-26. (Accepted 9 October 2005) Slow tracking for BMJ papers Christopher Martyn An editor argues against the current enthusiasm for fast tracking pages It seems that it all started with the Lancet.1 In 1997 it offered to publish selected manuscripts within four weeks of submission. They claimed that their motive was to get important data into the public health arena as quickly as possible, citing worrying (worrying!) instances that they and other journals had experienced of “delays in the publication of important data with major public-health messages.” Each week’s delay, they asserted, is “another week during which the research findings can leak out, perhaps in distorted form, via the mass media. Without the full paper, those health-care workers who advise the public are not privy to the caveats and interpretations made by the authors of the study.” Convinced? Well, JAMA was, and a year or two later it offered much the same thing.2 It dubbed the process EXPRESS (Expedited Peer Review and Editorial System for Science) presumably to give the impression that it was JAMA’s idea in the first place. Any number of other journals tagged along, and authors can now request fast track from the International Journal of Social Psychiatry, Neuropsychological Rehabilitation, the Euro- pean Journal of Developmental Psychology, the Journal of Molecular Endocrinology, and the Journal of Occupational and Environmental Medicine, to name but a few. There was even a time when the Quarterly Journal of Medicine offered to fast track papers. The BMJ has always been doubtful. As an editorial in 1999 pointed out: “It usually takes years to do a study and then years for change to happen: why rush around to reduce the time to publication by months?”3 But, in the end, we came around, signalling our half heartedness with the obscure—we reckoned ironic— icon of a bike with oval wheels. At least we were honest about the reasons: “We hope it will attract researchers with high quality studies to submit them to the BMJ, and we hope it will serve readers by helping us to attract better papers.” Evolutionary biologists will understand what’s going on here.4 In a complex and changing system, a species needs to continue to develop just to maintain its fitness relative to other species. If a mutation allows antelopes to run faster, cheetahs must evolve or starve. But it’s not only in arms races between predators and prey that this principle operates. It also happens when there is competition for limited resources. Trees in a forest compete for sunlight. If one tree grows taller, it captures sunlight that would otherwise have reached neighbouring trees. They are then forced to grow taller to avoid being overshadowed. Overall, the effect of competition is that trees become taller. But note the downside: there’s still the same amount of sunlight. It’s just that trees have to work harder to get their share. It’s the same with journals. To prosper they must attract the best papers—a limited resource. If one jour- nal makes itself more attractive to authors by speeding up its processes, others are constrained to follow. But the process engenders no increase in the number of good papers. Who benefits? Certainly not the journals—they’ve had to expend more editorial energy on publishing the same number of papers. The authors? Probably not, because the best papers were usually published fairly promptly anyway. Readers? Again, and for the same reason, probably not. It’s hard Because the author was so slow in delivering his manuscript, it had to be fast tracked to get into this issue Thoughts for today BMJ, London WC1H 9JR Christopher Martyn associate editor [email protected] BMJ 2005;331:1551–2 1551BMJ VOLUME 331 24-31 DECEMBER 2005 bmj.com 43© The Author 2014. Published by Oxford University Press on behalf of The Gerontological Society of America. All rights reserved. For permissions, please e-mail: [email protected] Examining Rowe and Kahn’s Concept of Successful Aging: Importance of Taking a Life Course Perspective James D. Stowe, MS*,1,2 and Teresa M. Cooney, PhD3 1Department of Human Development and Family Studies, University of Missouri, Columbia. 2Frank L. Mitchell Jr., MD Trauma Center, University of Missouri Hospital, Columbia. 3Department of Sociology, University of Colorado Denver. *Address correspondence to James Stowe, MS, Department of Human Development and Family Studies, University of Missouri, 314 Gentry Hall, Columbia, MO 65211. E-mail: [email protected] Received January 10 2014; Accepted April 23 2014. Decision Editor: Helen Q. Kivnick, PhD Purpose of the Study: This article critiques Rowe and Kahn’s conceptualization of suc- cessful aging using tenets of the life course perspective. Design and Methods: A review and synthesis of the literature on successful aging and studies that use a life course perspective. Results: We draw on life course principles that view development as a dynamic life- long process, embedded in historical time and place, and influenced by the web of rela- tionships individuals are linked to, as well as more distal social structural factors. This discussion questions the relatively static nature of Rowe and Kahn’s successful aging model, its emphasis on personal control over one’s later-life outcomes, and neglect of historical and cultural context, social relationships, and structural forces in influencing later-life functioning. Implications: Caution in using the model in its current formulation is needed, and we promote thinking about how successful aging can better align with micro- and mac- rolevel issues through utilization of a life course perspective. Key words: Successful aging, Life course perspective, Theory, Positive aging, Life span Our goal is to summarize and advance a critique of John Rowe and Robert Kahn’s (1987, 1997, 1998) conceptualization of successful aging (SA) from a life course perspective (Elder, Johnson, & Crosnoe, 2003). Introduced Abstract Special Issue: Successful Aging The Gerontologist, 2015, Vol. 55, No. 1, 43–50 doi:10.1093/geront/gnu055 Research Article Special Issue: Successful Aging Advance Access publication June 6, 2014 Downloaded from https://academic.oup.com/gerontologist/article-abstract/55/1/43/573784 by guest on 10 February 2018 mailto:[email protected]?subject= over 20 years ago, Rowe and Kahn’s model remains influ- ential and widely cited despite criticism from the academic community. Opportunities to improve Rowe and Kahn’s model through application of life course principles provide the impetus for this article. Although some may feel—after considering the model’s shortcomings—that it no longer has utility, the popularity of the model in the mainstream literature and extensive use in scientific inquiry warrants modification over disposal. Few conceptualizations of posi- tive aging have spurred such energetic academic inquiry and debate. The model’s development over time holds value and represents the process by which science is improved. Therefore, we encourage cautious use of the model in its current formulation and attempt to promote revisions to the SA construct and model as a means of promoting their utility for policy and practice. Rowe and Kahn’s model (1997), which is arguably the best known and widely applied model of SA (Dillaway & Byrnes, 2009), views “better than average” aging as a combi- nation of three components: avoiding disease and disability, high cognitive and physical function, and engagement with life. Their formulation aimed to eclipse prior thinking about disengagement and unavoidable senescence by focusing on activity and function (Johnson & Mutchler, 2014). Moreover, the model solidified a major turning point in gerontology and offered ample opportunities for funding programs that viewed elders as able, valuable societal members who bene- fited from engaged lives (see Everard, Lack, & Heinrich 2000 for an example of how the model provided a framework for program development). Their conceptualization of SA also views decline and functional loss as modifiable although largely through an individual’s own actions. Literature on SA, particularly Rowe and Kahn’s conceptualization, is prolific and thousands of articles cite or utilize this model. One problem with Rowe and Kahn’s model, however, is its sole focus on late adulthood as a point to make a static assessment of an individual’s “successful aging.” Thus, it fails to capture developmental processes and trajectories of continuity and change in function over time. A life course perspective, in contrast, is a dynamic perspective that considers development, history, and the importance of relationships over time. In application, a life course perspective combats the static “snapshot” cre- ated by Rowe and Kahn’s conceptualization and offers an enhanced opportunity to understand SA as a devel- opmental process. In this way, a life course perspective acts in concert with Rowe and Kahn’s model, especially with regard to the formulation of research questions and methodologies that may help counter the model’s weaknesses. Several aspects of a life course perspective (Elder et al., 2003) make it a valuable tool for evaluating this popular model of SA. First, a life course perspective views aging as lifelong and thus facilitates understanding of late-life “out- comes” and the development of effective prevention and intervention approaches (see Berkman, Ertel, & Glymour, 2011). Moreover, a long view of aging, with an emphasis on process and change over time, highlights the potential for growth and adaptation across the entire life span. A life course perspective points to the importance of context— historical, cultural, and social—for development and aging (Dannefer, 2012) and provides a more nuanced perspective of how social forces and individual agency interact to shape aging outcomes. We argue that Rowe and Kahn’s conceptu- alization relies too heavily upon individual agency. Additionally, Rowe and Kahn’s model describes physical function as a major characteristic of SA. A life course per- spective broadens this conceptualization by acknowledging that diverse experiences may lead to varying interpretations of success, both individually and culturally. Finally, a life course perspective focuses on linked lives. This concept highlights that, as social beings, individuals’ lives and life progress are influenced by significant others and their life progress. Recognition of such interconnected- ness strengthens dialogue on SA. Successful Aging: Then and Now Havighurst (1963) was part of early discussions of the concept of SA and distinguished two views of this phe- nomenon. An “outer” behavioral view focused on enact- ment of various social roles, whereas an “inner” subjective view emphasized life adjustment or satisfaction. Avoiding a behaviorally based conceptualization that aligned with either disengagement theory or activity theory—competing perspectives on aging during his time—Havighurst favored the latter approach. This individualized, subjective view of SA emphasized developmental continuity. Havighurst argued that the specific lifestyle favored by particular older adults depended on the lifestyles they had established ear- lier in adulthood. Havighurst (1963) concluded that “Inner satisfaction can be usefully defined and measured as a crite- rion of successful aging” (p. 311). This discussion of SA foreshadowed a view of aging that recognizes consistency in adults’ behavioral prefer- ences and lifestyles across the life span (Maddox, 1968), an idea later formalized in Atchley’s (1989) Continuity Theory of Aging. We highlight these ideas because a life course perspective is necessary in discussions of continu- ity, and processes promoting continuity across adulthood have been articulated by life course scholars (see Caspi & Roberts, 2001). Additionally, Havighurst’s conception rejects the “outer” view of SA assessed by narrow, behavio- ral measures like the engagement component of Rowe and The Gerontologist, 2015, Vol. 55, No. 1 44 Downloaded from https://academic.oup.com/gerontologist/article-abstract/55/1/43/573784 by guest on 10 February 2018 Kahn’s model. How the long view of aging challenges the health and functioning components of Rowe and Kahn’s SA model is considered next. Aging as a Lifelong, Intergenerational Process A life course perspective views aging as a life-span phe- nomenon and recognizes developmental influences that are launched prior to birth. Among these early influences are genetics, which Rowe and Kahn (1987) also acknowledge as important to aging outcomes. Additionally, environmental conditions and risks (e.g., poverty) are transmitted across generations in a family and ultimately affect development and aging (Ferraro, Pylypiv Shippee, & Schafer, 2009). Consideration of such factors is critical to understanding late-life outcomes, developmental potential, and the effec- tiveness of interventions targeted at negative outcomes. The pathways and processes through which early experi- ences affect late-life outcomes are articulated in three distinct life course models (Berkman, 2009; Berkman et  al., 2011; Hendricks, 2012). Early events or conditions may affect aging directly over time if they occur during a highly sensitive or critical period of development. The timing of exposure or the event may yield powerful consequences for subsequent development, illustrated by principle of timing of Elder and colleagues (2003), and may affect the efficacy of later inter- ventions (Berkman, 2009). Other life situations contribute to risks that build over time and gain influence in shaping later outcomes. Cumulative exposure operates differently from processes noted in the first, sensitive period model, but it also leads to outcomes that are deeply embedded in individuals’ lived experience and not easily modified. Finally, early conditions and events may influence later outcomes indirectly by shaping intermediate life situations, conditions, and roles that subsequently affect later-life outcomes. Unlike developmental consequences resulting from the two process models described previously, adult outcomes resulting from this type of “social trajectory model” (Berkman, 2009) may be resolved by altering the intermediate situations that create proximal risk (Berkman et al., 2011). These models challenge Rowe and Kahn’s assertions that many of the risk factors for SA are potentially modifiable (Rowe & Kahn, 1997) and that individual agency is central to achieving SA (Kahn, 2002). Indeed, Kahn (2002) claimed that a goal in offering the SA model was “that research on successful aging and its biopsychosocial determinants would encourage people to make lifestyle choices that would maxi- mize their own likelihood of aging well, that is maintaining a high quality of life in old age” (p. 726). Rowe and Kahn’s emphasis on personal agency was wel- come in the late 20th century as conventional wisdom about aging had long been characterized by notions of inevitable and irreversible loss and decline. Historic overview of these developments notes how perspectives like the SA model could have promoted more positive views of older adults and aging (Dillaway & Byrnes, 2009). Yet, by stressing personal control and individual agency in old age—at the neglect of early influences and long-term disease and disa- bility processes—Rowe and Kahn’s model creates problems similar to the one-sided view of aging that they attempted to eliminate. A  life course perspective offers a more bal- anced view of aging by recognizing substantial continuity in developmental processes and patterns over time while accounting for personal agency and change within the con- text of structural constraints (what Settersten 2003, p. 30, calls “agency within structure”). Several life course studies demonstrate how adult health is significantly shaped by childhood vulnerability or risk exposure. The Dutch Famine Birth Cohort Study revealed that exposure to inadequate maternal nutrition during World War II heightened the risk of coronary artery dis- ease in adulthood among cohorts born during that period (Painter et al., 2006). Similarly, Brandt, Deindl, and Hank’s (2012) multination analysis indicated that economic dis- advantage in childhood significantly predicted SA classi- fications in adulthood (using criteria like those of Rowe and Kahn). These classifications differed from those pre- dicted by respondents’ current socioeconomic status alone. Additionally, Schafer and Ferraro (2012) assessed the impact of childhood influences (e.g., parental abuse) and concurrent adult factors (e.g., smoking) on “disease free” status in old age. These two sets of influences were of com- parable strength in predicting this late-life criterion. Despite ample evidence for continuity in health func- tion and health-related behaviors across the life span (Lee et  al., 2010; McCambridge, McAlaney, & Rowe, 2011), research showing modified health risk in conjunction with behavior change also exists (Cox, 2006; Critchley & Capewell, 2003). For example, Pruchno, Hahn, and Wilson-Genderson (2012) compared current and former smokers to determine whether smoking cessation and its timing affected adults’ SA classifications. Smoking cessa- tion did increase former smokers’ chances of a SA clas- sification relative to current smokers, but only if they quit smoking before age 30. The impact of cumulative exposure also was evident, with “pack-years” of smoking reducing the likelihood of SA. Applying a life course lens thus challenges the reversibility of broad SA classifications like that of Rowe and Kahn. Although personal agency and behavioral change may alter single health indicators, the extent to which they can reverse one’s overall SA clas- sification in the Rowe and Kahn model is unknown. Identifying effective interventions for various late-life conditions is also difficult without employing a long-term The Gerontologist, 2015, Vol. 55, No. 1 45 Downloaded from https://academic.oup.com/gerontologist/article-abstract/55/1/43/573784 by guest on 10 February 2018 view of aging. For conditions shaped directly by early expo- sure during critical periods, or via cumulative exposure initi- ated by early events and conditions, it is unrealistic to assume that lifestyle changes can reverse the problem. Berkman and colleagues (2011) argue, “…most of our interventions to improve the health of older populations come too late in the evolution of disease and disabling processes” (p. 338). Thus, Rowe and Kahn’s (1997) vision of SA may be unattainable for many due to early events and circumstances beyond one’s control in later life. Constraints operating at the macrolevel rather than the microlevel are addressed later. Linked Lives: Expanding the Social Component of Successful Aging A life course perspective’s emphasis on the interdepend- ence of individuals’ lives improves upon Rowe and Kahn’s (1997) focus on individual decisions and actions in determining aging outcomes. As discussed, family cir- cumstances, relationships, and events represent powerful influences on early development, with potentially long- term consequences (Brandt et  al., 2012; Ferraro et  al., 2009; Schafer & Ferraro, 2012; Shaw & Krause, 2002). The influence of social contacts for development and aging likely broadens as individuals enter adulthood and social worlds expand. Christakis and colleagues documented the significant role of social connections in health-related behaviors (e.g., eat- ing, smoking, and sexual risk taking) (Christakis & Fowler, 2009) and health outcomes (Elwert & Christakis, 2008). They found that social network influences extend up to three degrees (i.e., from friends of friends of friends) and that some health conditions are influenced more by friends than by closer relations such as spouses (Christakis & Fowler, 2009). Yet, the significance of marital ties for adult well-being is firmly established. Among young (Kiecolt-Glaser & Newton, 2001) and older couples (Bookwala, 2005), marital interac- tions are known to influence health status, physical symp- toms, and chronic conditions (Bookwala, 2005). Spouses also affect each other’s social engagement. Curl, Proulx, Stowe, and Cooney (in press) found that if one’s spouse ceased driv- ing, then paid employment and volunteering decreased, even after controlling for one’s own driving status and health. Spousal similarity also illustrates the interdepend- ent nature of development. Substantial congruence exists in married partners’ physical and social functioning (Ko, Berg, Butner, Uchino, & Smith, 2007), cognitive perfor- mance (Gruber-Baldini, Schaie, & Willis, 1995; Ko et  al., 2007), and risk for specific chronic diseases (Hippisley- Cox, Coupland, Pringle, Crown, & Hammersley, 2002). Such similarity may result from assortative mating (Buss, 1984) as well as the conditions that couples cocreate and share over their lives (Caspi, Herbener, & Ozer, 1992). Clearly, considering SA a product of individual action and processes alone is problematic. The life course perspective’s emphasis on linked lives also highlights opportunities for aging interventions involving family and other social relationships. Although Berkman and colleagues (2011) cite several studies in which efforts to alter features of one’s social networks (e.g., network integration) as a means of health intervention were unsuccessful, more effective solutions may result from utilizing established social connections for health interventions. For example, evidence shows that when one partner is enrolled in a weight reduction program, chances of weight loss for the nonenrolled spouse increase as well (Gorin et al., 2008). Thus, it is inadequate to view individuals as solely responsible for health or develop- mental problems; likewise, it is restrictive to limit interven- tion efforts to the individual with the targeted problems. Successful Aging and Historical Time Historical time is central to a life course perspective, as it describes development as embedded in sociohistorical con- ditions that change over time. To date, this idea has been neglected in discussions of SA. An exception is work by Dillaway and Byrnes (2009) that analyzed the historical and sociopolitical context when Rowe and Kahn’s model emerged. Neglect of historical time is critical because it puts theorists at risk of formulating and promoting definitions and operationalizations of SA that are historically bound and may quickly become inappropriate. If the SA construct is to guide health policy and programming, the impact of historical time on aging must be considered. Though several studies document historical shifts in mortality (Crimmins & Beltran-Sanchez, 2011), disability, and health (Seeman, Merkin, Crimmins, & Karlamangla, 2010), we know of only one study that considers cross- time changes in levels of SA. Using a definition of SA model akin to Rowe and Kahn’s model, McLaughlin, Connell, Heeringa, Li, and Roberts (2010) reported a noticeable drop in rates of SA from 1998 to 2004 using the U.S. Health and Retirement Study. The odds of older adults meeting the “successful” classification declined 25\% over this period due largely to increased rates of chronic disease and physi- cal impairment. This finding is disconcerting because of public health problems such as obesity in the United States and related warnings about chronic cardiovascular prob- lems and other obesity-related diseases. Age stereotypes also arise out of existing sociohistorical conditions. A 2009 report by Levy, Zonderman, Slade, and Ferrucci noted effects of age stereotypes on cardiovascular health in later life. They found that holding negative age ste- reotypes prior to older adulthood predicted cardiovascular The Gerontologist, 2015, Vol. 55, No. 1 46 Downloaded from https://academic.oup.com/gerontologist/article-abstract/55/1/43/573784 by guest on 10 February 2018 episodes later in life, whereas possessing positive age ste- reotypes provided future protection against such events. In addition to shaping stereotypes, historical conditions influ- ence the mechanisms through which stereotypes are per- petuated, as is the case with social media technology today (Levy, Chung, Bedford, & Navrazhina, 2014). Heterogeneity in development is another issue empha- sized in a life course perspective. Although Rowe and Kahn’s model allows for varying degrees of SA as defined by the model’s three main components, it overlooks hetero- geneity resulting from self-rated, subjective success in aging (Romo et  al., 2013). This issue of heterogeneity in aging experiences also is tied to historical time. For example, diversity among U.S. elders and their aging experiences is epitomized by the Hispanic and Latino populations, which will continue to grow in proportion and significance within the aging population (Hilton, Gonzalez, Saleh, Maitoza, & Anngela-Cole, 2012). Health inequalities may contribute negatively to the aging experiences of these groups (Villa, Wallace, Bagdasaryan, & Aranda, 2012). As increasingly diverse perceptions and experiences characterize the aging population, we must avoid marginalizing differences and formulate dynamic, inclusive conceptualizations of SA. Importance of Place Beyond standing the test of time, useful models of SA will recognize cultural variation and acknowledge potential cul- tural bias. A life course perspective emphasizes the impor- tance of place in human development and aging. Although Rowe and Kahn’s (1987) early writing referred to cultural differences in various health factors, their model inad- equately accounts for them. Cultural differences may exist in how individuals view their health, what they consider important in life, and meanings of “success.” Hung, Kempen, and DeVries’s (2010) review of 34 “healthy aging” found that personal, family, and spiritual domains of life were mentioned more in lay than academic reports of healthy aging, and family ties and financial stabil- ity played a unique role in Eastern cultures. Such variations reflect the salience of the family collective in Eastern cultures and their emphasis on interdependence rather than independ- ence in aging. The value of offspring and importance of fam- ily engagement, specifically over “social” engagement, are additional themes in Eastern conceptualizations. Recent Western conceptualizations of “harmonious aging” represent attempts to acknowledge global differ- ences and accommodate a broader set of values in defin- ing SA (Liang & Luo, 2012). Although not explicit, these authors rely on tenets of a life course perspective to elucidate harmonious aging, acknowledging contextual influences on individuals’ interpretations and achievement of balance in later life. Notably, North American views of social engage- ment depend more on physical function (which is needed to provide practical support) and that engagement and pro- ductivity are defined in capitalist terms in Rowe and Kahn’s SA model (Dillaway & Byrnes, 2009). Attention to place also highlights elements at the mac- rolevel that influence aging outcomes. Hank (2011) and colleagues (Brandt et al., 2012) considered the role of coun- try-level income inequality in rates of SA in 14 European countries. Using a conceptualization of SA similar to that of Rowe and Kahn, Hank (2011) documented dramati- cally higher rates of SA in Northern European (e.g., 21\% in Denmark) than Southern European (3.1\% in Spain) and Eastern European (1.6\% in Poland) countries, which mir- rored cross-national differences in income inequality and welfare state provisions. In their later study, Brandt and colleagues (2012) found that country-level differences in SA associated with income inequality remain significant even after accounting for individual-level predictors of SA. Thus, societal level policies that contribute to income inequality affect SA rates at the macrolevel, regardless of individuals’ personal characteristics and lifestyles. Other cultural variations such as physiological factors (e.g., bone structure) may explain cross-national variabil- ity in the disability component of SA (Santos-Eggimann, Cuénoud, Spagnoli, & Junod, 2009), and variable employ- ment and retirement policies across countries may affect rates of productive engagement—a component of SA (Hank, 2011). These distal structural factors shape the more proximal settings in which individuals live and the experiences they encounter. The Role of Social Structure in Successful Aging Though life course scholars have yet to fully define the components of social structure, the socially constructed categories of race, gender, and social class are key influ- ences on aging, as are institutional structures and policies that regulate behavior and provide resources when indi- viduals encounter risks across the life course (Leisering & Schumann, 2003; Zagel, 2013). Strengthened by a grow- ing body of empirical findings (e.g., Brandt et  al., 2012; Schafer & Ferraro, 2012), substantial criticism (Dillaway & Byrnes, 2009) has been directed at Rowe and Kahn’s model for its neglect of social structure influences and over- emphasis on personal action in aging outcomes. By over- stating the role of personal causation in both the causes and potential resolution of some health problems, Rowe and Kahn’s model neglects social inequalities that interfere with SA. In Riley’s terms (1998), it also “fails to develop adequately the social structural opportunities necessary for realizing success” (p. 151). The Gerontologist, 2015, Vol. 55, No. 1 47 Downloaded from https://academic.oup.com/gerontologist/article-abstract/55/1/43/573784 by guest on 10 February 2018 Though Rowe and Kahn (1997) move beyond a solely ontogenetic view of development by emphasizing external and lifestyle factors in their model, their discussion does not look beyond personal lifestyle and microlevel environ- mental influences. Thus, macrostructural factors, such as one’s status/position in society, are overlooked although they can shape one’s immediate environment and access to health resources (e.g., good medical care or nutri- tious food) (Holstein & Minkler, 2003). Consequently, sharp social class disparities exist in disease prevalence, frailty, and other health indicators (Crimmins, Kim, & Vasunilashorn, 2010). The cross-national studies on income inequality (Brandt et  al., 2012; Hank, 2011) discussed previously offer con- vincing evidence that SA outcomes are not accessible to all. At the individual level, structural characteristics like edu- cational attainment consistently predict SA classifications (Hank, 2011; McLaughlin et  al., 2010; Pruchno, Wilson- Genderson, Rose, & Cartwright, 2010; Santos-Eggimann et  al., 2009), as do race (McLaughlin et  al., 2010), finan- cial adequacy (Hank, 2011), and gender (Hank, 2011; McLaughlin et  al., 2010; Pruchno et  al., 2010; Santos- Eggimann et  al., 2009). Evidence that structural factors affect aging does not negate the role of human agency, but it reminds us that agency is restricted by socially con- structed opportunities and constraints. Institutional forces as an aspect of the macroenviron- ment and social structure that shape individuals’ lives also are not adequately addressed in Rowe and Kahn’s model. Riley (1998) was among the first to point out their neglect of institutional influences, such as the workplace, com- munities, and schools, on the aging process. She argued that the chances of enhancing one’s health and well-being depended heavily on structural opportunities and that interventions aimed at personal change require structural interventions. In rebuttal, Kahn (2002) noted that their model emphasized “what individuals themselves can do to use, maintain, and perhaps even improve what they have—their physical and mental capacities” (p.  726), whereas Riley focused on what societies can do via insti- tutional and structural interventions. His point, however, overlooks the interplay of microlevel context, mesolevel … © The Author 2014. Published by Oxford University Press on behalf of The Gerontological Society of America. All rights reserved. For permissions, please e-mail: [email protected] Successful Aging and Its Discontents: A Systematic Review of the Social Gerontology Literature Marty Martinson, DrPH*,1 and Clara Berridge, MSW2 1Department of Health Education, San Francisco State University, California. 2School of Social Welfare, University of California, Berkeley. *Address correspondence to Marty Martinson, DrPH, Department of Health Education, San Francisco State University, 1600 Holloway Avenue, HSS Building, Room 326, San Francisco, CA 94132. E-mail: [email protected] Received January 10 2014; Accepted March 28 2014. Decision Editor: Rachel Pruchno, PhD Purpose of the Study: The purpose of this study was to analyze the range of critiques of successful aging models and the suggestions for improvement as expressed in the social gerontology literature. Design and Methods: We conducted a systematic literature review using the follow- ing criteria: journal articles retrieved in the Abstracts in Social Gerontology, published 1987–2013, successful aging/ageing in the title or text (n = 453), a critique of successful aging models as a key component of the article. Sixty-seven articles met the criteria. Qualitative methods were used to identify key themes and inductively configure mean- ings across the range of critiques. Results: The critiques and remedies fell into 4 categories. The Add and Stir group sug- gested a multidimensional expansion of successful aging criteria and offered an array of additions. The Missing Voices group advocated for adding older adults’ subjective meanings of successful aging to established objective measures. The Hard Hitting Critiques group called for more just and inclusive frameworks that embrace diversity, avoid stigma and discrimination, and intervene at structural contexts of aging. The New Frames and Names group presented alternative ideal models often grounded in Eastern philosophies. Implications: The vast array of criteria that gerontologists collectively offered to expand Rowe and Kahn’s original successful model is symptomatic of the problem that a Special Issue: Successful Aging The Gerontologist, 2015, Vol. 55, No. 1, 58–69 doi:10.1093/geront/gnu037 Research Article Special Issue: Successful Aging Advance Access publication May 9, 2014 58 Downloaded from https://academic.oup.com/gerontologist/article-abstract/55/1/58/571855 by guest on 10 February 2018 mailto:[email protected]?subject= normative model is by definition exclusionary. Greater reflexivity about gerontology’s use of “successful aging” and other normative models is needed. Key words: Successful aging, Social gerontology, Critical gerontology Successful aging currently holds a prominent position in social gerontology research (Alley, Putney, Rice, & Bengtson, 2010). It became an increasingly popular model following Rowe and Kahn’s introduction of the distinction between “usual” and “successful” aging (1987) and their subsequent work that explicated the three key components of successful aging: the avoidance of disease and disability, the mainte- nance of cognitive and physical function, and social engage- ment (1997). Over the past two decades, successful aging research has expanded beyond these end point criteria with the development of models that describe processes that can lead to successful aging (for a history of successful aging mod- els, see Pruchno, Wilson-Genderson, Rose, & Cartwright, 2010). As Villar (2012) described, Rowe and Kahn’s model “boosted interest in the biological, behavioural and social factors which determine the attainment of ageing well, and has encouraged the adoption of a new, preventive and optimistic approach to the final decades of life” (p.  1089). Over time, successful aging has been modified and inter- preted in many different ways to the point where it is widely acknowledged that there is no agreed upon definition of the concept (Bowling & Iliffe, 2006; Ferri, James, & Pruchno, 2009; McLaughlin, Jette, & Connell, 2012). Nevertheless, it appears in social gerontology research as frequently as the theories that dominate the field (Alley et al., 2010). Although successful aging models are prominently posi- tioned, they have also been contested. One of the earliest critiques of Rowe and Kahn’s model appeared in a 1998 letter to the editor in The Gerontologist, in which social gerontologist Matilda Riley called the model “seriously incomplete” (p.  151) for its sole focus on individual suc- cess and its neglect of the structural and social factors that influence aging. For over two decades, social gerontologists have grappled with the ways in which successful aging has and has not captured the personal, social, economic, and political contexts of aging. Challenges to successful aging frameworks range from those that suggest minor modifica- tions to those that more deeply critique the core ideologies embedded in the construct. As Cole (1995) observed, “the growth of an intellec- tually rich social gerontology depends on the continued willingness to foster greater interactions between empiri- cal research, interpretation, critical evaluation, and reflex- ive knowledge” (p. S343). This study takes a step toward building these “greater interactions” by creating a cohesive summary of the critical questions raised since successful aging’s 1987 introduction. Although much of the published research on successful aging includes an overview of the model and some mention of the gaps or weaknesses in one or more successful aging frameworks, there has not yet been a systematic review of the full range of concerns and cri- tiques expressed over time about the concept. Such a review can be useful in further building reflexive knowledge. By identifying and analyzing the range of critiques of successful aging, we may be better able to foster the intellectually rich social gerontology that Cole speaks of and further develop a dynamic science of aging that translates into practices and policies that are supportive of people as they age. To that end, we conducted a systematic review of the literature on successful aging to answer the following question: Within the social gerontology literature published since 1987, what concerns have been expressed about successful aging mod- els and what suggestions for improvement have been made? Methods In this systematic literature review, we examined peer- reviewed articles in the Abstracts in Social Gerontology (ASG) database published between January 1987 and December 2013. Certainly, notable critiques of success- ful aging have been published in scholarly publications that are not included in the ASG database (Belgrave & Sayed, 2013; Calasanti, Slevin, & King, 2006; Katz, 2013); however, we narrowed our search to the ASG because it provided a broad range of interdisciplinary research in social gerontology including, for example, biological, psychological, sociological, economic, cul- tural, and critical studies in aging. We searched for arti- cles that had successful aging/ageing in the title or all text (n  =  453), then selected those that included a cri- tique of successful aging models as a key component of the article. Using the earlier criteria, we identified 67 articles, which included empirical studies, theoretical analyses, and editorials. As a configurative review, qualitative methods were used to analyze the data in order to identify key themes and inductively configure meanings across the range of critiques of successful aging (Gough, Oliver, & Thomas, 2012). We conducted initial coding to name the key points made in each paper’s critiques of successful aging and the proposed ideas for improved models. In a second round of axial cod- ing, we inductively identified key themes across codes and The Gerontologist, 2015, Vol. 55, No. 1 59 Downloaded from https://academic.oup.com/gerontologist/article-abstract/55/1/58/571855 by guest on 10 February 2018 then named broader connections across these themes that represented a higher level of abstraction. To enhance inter- rater reliability, the two authors individually coded a subset of 15 articles and met to discuss and compare their analyses and identify common codes. We did the same thing when placing the articles into key theme groupings and continued with the analysis when we were confident that the codes and categories were well defined. Although the articles across categories sometimes over- lapped in terms of their critiques of successful aging (e.g., the focus on physiological aspects of aging, the cultural biases and limitations of criteria, the denigration of people with disabilities or illness), they were placed in categories that were distinguished by the recommendations made for addressing those shortfalls. Four categories emerged: Add and Stir, Missing Voices, Hard Hitting Critiques, and New Frames and Names. The final stage of analysis involved synthesizing these categories to offer an explanation for what this body of research suggested about social gerontol- ogy’s relationships to successful aging. Findings Theme 1: Add and Stir Sixteen of the 67 reviewed articles accepted the idea that successful aging could stand as a model but identified sev- eral gaps in current models. Two kinds of solutions emerged from these critiques: loosen the criteria given the very low prevalence of successful aging using existing criteria and expand the model by adding missing criteria. By keeping a successful aging model as the baseline and offering a multi- tude of additions to address the gaps, these critiques took a kind of Add and Stir approach. A Prevalence Problem The results of Bowling and Iliffe’s (2006) study of the prevalence of successful aging in Britain using a biomedi- cal model, expanded biomedical model, social function- ing model, psychological resources model, and lay model derived from criteria found in the literature revealed rates of 16\%–24\%. Similarly, using four time points of the Health and Retirement Survey, McLaughlin, Connell, Heeringa, Li, and Roberts (2010) calculated the prevalence of successful aging based on Rowe and Kahn’s model and found that no more than 11.9\% of people aged 65 and older met the cri- teria in any year. A follow-up study compared increasingly relaxed criteria and found prevalence rates of 3.3\%–33.5\% (McLaughlin et al., 2012). The researchers articulated con- cerns about successful aging criteria being too narrow to be of use for public health purposes “unless one wishes to limit the study of healthy aging to those with near-perfect health” (p. 787). McLaughlin and coworkers recommended lowering the threshold or loosening the criteria while pre- serving the foundation of Rowe and Kahn’s model. Hank (2011) replicated the study of McLaughlin and coworkers (2010) in a comparison of European countries and Israel. He found that the U.S. rate of 11.9\% ranked it in the middle of other countries. National income inequal- ity was positively associated with lower rates of successful aging, and welfare states played a likely role in enabling or hampering successful aging. Hank (2011) acknowledged the value of relaxing Rowe and Kahn’s criteria and also called for “policy interventions supporting individuals’ opportunities for successful aging” (p. 230). Additional Criteria Several scholars identified gaps in various successful aging models and recommended additional criteria. Like others, Young, Frick, and Phelan (2009) critiqued the emphasis on physiological aspects of aging in Rowe and Kahn’s successful aging constructs. They offered a graded approach that included physiological, psychological, and social dimensions. Young and coworkers defined success- ful aging as a state in which a person uses physical and social adaptive strategies “to achieve a sense of well-being, high self-assessed quality of life, and a sense of personal fulfillment even in the context of illness and disability” (p. 88–89). Other empirically based critiques of the Rowe and Kahn model have called for its expansion by adding the following: subjective criteria (Coleman, 1992); spiritu- ality (Crowther, Parker, Achenbaum, Larimore, & Koenig, 2002); marital status and quality (Ko, Berg, Butner, Uchino, & Smith, 2007); positive as opposed to pathological health characteristics (Kaplan et al., 2008); and broader multidi- mensional constructs encompassing cognitive and affec- tive status, physical health, social functioning, engagement and life satisfaction (Tze Pin, Broekman, Niti, Gwee, & Fe Heok, 2009), and leisure activity (Lee, Lan, & Yen, 2011). Researchers have also suggested modifications to Baltes and Baltes’ (1990) selective optimization with compensa- tion model of successful aging. Steverink, Lindenberg, and Ormel (1998) proposed the Social Production Function Theory to better integrate social context with behavior. More recently, Villar (2012) proposed infusing criteria for successful aging with a multifaceted generativity concept incorporating social, community, and personal develop- ment. He contended that gains coexist with losses and that generation—in addition to loss regulation or mainte- nance—must be factored into successful aging. Theme 2: The Missing Voices Almost half (30) of the 67 critiques of successful aging models focused on the Missing Voices—the subjective The Gerontologist, 2015, Vol. 55, No. 1 60 Downloaded from https://academic.oup.com/gerontologist/article-abstract/55/1/58/571855 by guest on 10 February 2018 definitions of successful aging from older adults. Similar to the Add and Stir group, these authors critiqued the nar- rowness of successful aging criteria. In contrast to the Add and Stir critiques, this group explicitly named the need for additional successful aging criteria that were derived from the perspectives of elders. Compare and Contrast Given the disparity between self-rated rates of successful aging and established criteria, several researchers called for the addition of successful aging criteria generated by older adults’ subjective measures. Strawbridge, Wallhagen, and Cohen (2002) reported a significant difference between self-ratings and ratings based on Rowe and Kahn’s crite- ria (50.3\% vs. 18.8\%). Cernin, Lysack, and Lichtenberg (2011) similarly found that 63\% of African American elders in their sample reported aging successfully compared with 30\% who met the Rowe and Kahn criteria. Phelan, Anderson, LaCroix, and Larson (2004) also found that subjective meanings of successful aging differed from those of the published literature and that the multidimensional perceptions of older adults (which encompassed physi- cal, functional, social, and psychological health) were not fully represented in any successful aging model. Based on data from the Manitoba Follow-up Study, researchers found that lay persons’ definitions may be relatively con- sistent over time and should be taken into account (Tate, Swift, & Bayomi, 2013). Pruchno, Wilson-Genderson, and Cartwright (2010) proposed a two-part model of subjective and objective measures. This included objective measures of having few chronic conditions, maintaining functional ability, and experiencing little pain, and subjective ratings of how successfully one has aged, how well one is aging, and how one would rate one’s life these days. Three studies reported that avoidance of disability or chronic physical illness was not predictive of subjective suc- cessful aging. Strawbridge and coworkers (2002) found that functional status specifically was not predictive of subjec- tive successful aging. Montross and coworkers (2006) simi- larly found that 92\% of their sample viewed themselves as successfully aging, despite the fact that the majority expe- rienced disability and chronic physical illness. Romo and coworkers (2013) examined subjective rates of successful aging among an ethnically diverse sample of older adults with late-life disability, the majority of whom reported that they had aged successfully. This body of research that compared objective and subjective measures identified a wide range of subjectively defined criteria that should be added to current success- ful aging conceptualizations, including several dimensions of emotional well-being and spirituality (Lewis, 2011); comportment and acceptance of change (Rossen, Knafi, & Flood, 2008); self-acceptance and self-contentment (Reichstadt, Sengupta, Depp, Palinkas, & Jeste, 2010); self- care, accepting the aging process, and financial well-being (Hilton, Gonzalez, Saleh, Maitoza, and Anngela-Cole, 2012); and living with family, and receiving emotional care (Hsu, 2007). As a whole, and similar to the Add and Stir group, this group of critiques presented a dizzying array of missing components offered to strengthen current success- ful aging conceptualizations. Cultural Relevance and Variability For over a decade, researchers have critiqued the lack of cultural breadth of successful aging models and asserted the need to better capture subjective meanings of success- ful aging from diverse cultural perspectives. Soondool and Soo-Jung (2008) suggested additional subjective cri- teria including “success of adult children” and “a positive attitude toward life” (p.  1061) after examining meanings of successful aging among low-income elders in South Korea. Lewis (2011) interviewed Alaskan Natives Elders in southwest Alaska and found that successful aging was best defined through a culturally congruent concept of elderhood and its four key components as articulated by the study participants. Hilton and coworkers (2012) found culturally embedded meanings expressed by older Latinos that were absent from criteria used in dominant models, and they called for greater clarity on the multiple dimen- sions and processes of successful aging. Many have critiqued the Western, white, middle class bias in successful aging conceptualizations (Kendig, 2004; Ng et  al., 2011). Two studies challenge Rowe and Kahn’s (1997) and Phelan and coworkers’ (2004) meas- ures of successful aging in terms of their cross-cultural relevance to Japanese Americans (Iwamasa & Iwasaki, 2011; Matsubayashi, Ishine, Wada, & Okumiya, 2006). Iwamasa and Iwasaki (2011) generated a model with six components that shared broad similarities with existing measures of physical, psychological, social, and cognitive health but included culturally specific dimensions of these measures that differed in meaning from existing measures. The Japanese Americans’ approach to independence, for example, focused more on a collectivist concern for oth- ers and “adjusting one’s needs to maintain group harmony” (p. 274) rather than taking a more individualistic focus on oneself. Iwamasa and Iwasaki’s model also included crite- ria of financial security and spirituality. Ng and coworkers (2011) examined Chinese cultural contexts of successful aging and recommended a model that included both car- ing and productive forms of engagement as substitutes for Rowe and Kahn’s engagement with life component. Adding new dimensions to cultural analyses of successful aging, Torres (1999, 2001, 2003, 2006, 2009) explored the The Gerontologist, 2015, Vol. 55, No. 1 61 Downloaded from https://academic.oup.com/gerontologist/article-abstract/55/1/58/571855 by guest on 10 February 2018 complexity of value orientations that underlie definitions of successful aging for older adults who migrated between cultures—Iranians who migrated to Sweden. Torres (2006) found great variability not only in how people define suc- cessful aging but also in how they arrive at those defini- tions and what understandings are imbedded within those definitions. This intracultural approach problematized cul- turally specific notions of successful aging as her findings demonstrated not only intercultural differences but also differences within cultures. As Torres asserted, “although cultural values might guide the way in which people make sense of what constitutes a good old age, these values do not necessarily predispose people to conceive of successful aging in any one particular way” (p.  20). Torres thereby challenged the relevance of culture-specific and static meas- ures of successful aging, and she called for a broadening of gerontological frameworks of successful aging (Torres, 2001). Overall, these Missing Voices critiques challenged the lack of subjective meanings and consequential cultural relevance in dominant models of successful aging. As with the Add and Stir group, this group of critiques called for changes to the models but kept the broader notion of suc- cessful aging as an ideal relatively intact. Theme 3: Hard Hitting Critiques Fourteen articles, ranging in publication date from 1990 to 2013, presented critiques of the “assumptions, con- ceptualization, and application” (Scheidt, Humpherys, & Yorgason, 1999, p. 277) of the successful aging paradigm and raised serious concerns about its continued usage in gerontology and biomedicine (Dillaway & Byrnes, 2009). These articles were notable for the breadth and depth of their critiques of successful aging and thus became a major component of the literature review findings. The Hard Hitting Critiques were grounded in a variety of disciplines including critical gerontology, critical studies, feminist dis- ability studies, narrative gerontology, and critical discourse analysis. Although the critiques varied in their particular focus, they shared one or more key concerns about success- ful aging, including its individualistic approach, implied ageism and ableism, neoliberal contexts, negative influ- ences on society and the lived experiences of older adults, and impacts on social justice. Furthermore, they rejected the notion of “successful” aging more broadly and called for alternative frameworks. Individualism This literature articulated repeated concerns about the indi- vidual focus of the successful aging paradigm as unrealis- tic and exclusionary (Angus & Reeve, 2006; Holstein & Minkler, 2003; Morell, 2003; Scheidt et  al., 1999; Stone, 2003). Critics argued that representing aging—and in particular, physical and cognitive health—as being within the control of individuals through the adoption of spe- cific behaviors and attitudes, reflected a medicalized view of aging that ignored social, economic, and cultural con- texts of people’s lives (Clarke & Griffin, 2008; Dillaway & Byrnes, 2009; Leibing, 2005), including the inequities in life chances by class, gender, race, ability, and other intersect- ing social locations (Minkler, 1990). Scheidt and coworkers (1999) provided an early critique of the narrow, individual- istic view of the successful aging perspective and noted that successful aging failed to take into account the sociostruc- tural contexts of aging that “play a powerful determinative role in how we age” (p. 278). Over the years, critics have repeatedly argued that these broader contexts, such as access to education, employment, quality housing conditions, healthy food, and recreation, work in favor of the most privileged populations and make them more likely to age successfully, whereas marginalized (less privileged) groups are less likely to experience such success (Dillaway & Byrnes, 2009; Holstein & Minkler, 2003). Furthermore, describing successful aging as an end point erroneously constructs aging as “not a broad bioso- cial process that involves the development of new roles, viewpoints, and many interrelated social contexts but, rather, a game which can be won or lost on the basis of whether individuals are diagnosed as successful or usual” (Dillaway & Byrnes, 2009, p. 706). Ageism and Ableism Several critics noted the often-unrecognized and inter- twined ageism and ableism that are inherent in successful aging models (Holstein & Minkler, 2003; Minkler, 1990; Morell, 2003; Stone, 2003). Successful aging names the avoidance of disease and disability as the ideal and implic- itly good aging, whereas the presence of usual aging pro- cesses is deemed undesirable or bad aging. This binary of successful versus unsuccessful aging is said to create a “new ageism” (Angus & Reeve, 2006, p.  143) or “polar- ized ageism” (attributed to Cole, 1992 and McHugh, 2003 in Rozanova, Northcott, & McDaniel, 2006). As Holstein and Minkler (2003) pointed out, “normative terms such as successful aging are not neutral; they are laden with comparative, either-or, hierarchically ordered dimensions” (p.  791). Others explained that by naming the avoidance of disease and disability as success, successful aging carries an “implied hostility toward aging bodies” (Morell, 2003, p. 69) and, in particular, toward disabled or diseased bodies that are by default deemed failures. This creates a powerful dichotomy that “values cognitive and physical ability while denigrating any kind of disability” (Stone, 2003, p. 62) and The Gerontologist, 2015, Vol. 55, No. 1 62 Downloaded from https://academic.oup.com/gerontologist/article-abstract/55/1/58/571855 by guest on 10 February 2018 blaming elders with disabilities and illness for their con- ditions and subjecting them to moral judgments by soci- ety (Clarke & Griffin, 2008; Holstein & Minkler, 2003; Morell, 2003; Rozanova et al., 2006). Neoliberal and Conservative Contexts Many of the Hard Hitting Critiques highlighted successful aging’s neoliberal ideological underpinnings. By focusing the responsibility on individuals to maintain physical and cognitive function, the successful aging paradigm reflects and serves efforts to limit the state’s responsibility to pro- vide social and other supports for elders and people with disabilities and, notably, to address the social and structural inequities that create illness and disability in the first place (Dillaway & Byrnes, 2009; Minkler, 1990; Morell, 2003; Scheidt et  al., 1999; Sinding & Gray, 2005). As Holstein and Minkler (2003) described, this further marginalizes older populations who rely on safety net programs: Policies promoting increased Medicare coverage for home modifications and assistive devices, as well as increased Supplemental Social Security Income payments that would bring elderly and disabled recipients above the poverty line, may well suffer at the hands of a popu- lace and a legislature that has bought the stereotypes of a new breed of successfully aging seniors who no longer need much in the way of government support. (p. 793) Dillaway and Byrnes (2009) emphasized the historical con- texts in which successful (and productive) aging paradigms first emerged. The rise of these paradigms in the 1980s and 1990s coincided with a rising conservatism that sought to place blame for U.S.  economic crises on the welfare state and, in particular, on Social Security and Medicare. Because these models appear to blame aging individuals for their failure to avoid disability or dependence, their timely emer- gence “may have facilitated and bolstered” (p.  708) the government’s increasing anxiety about the burden of the aging population and been used as “tools for furthering negative conceptualizations of aging and reducing the pub- lic burden of aging individuals” (pp. 708–709). Influences, Applications, and Internalizations Scheidt and coworkers (1999) raised early concern about the successful aging model’s placement of moral value on the individual’s ability to avoid illness and disability and the “value transfer to the public domain” (p.  278). More recently, several studies demonstrated that there has indeed been a value transfer of these moral hierarchies to the pub- lic as people internalize, integrate, and sometimes resist the ideal as they negotiate their own aging identities. Media portrayals of old age reflect and reproduce successful aging discourses. Rozanova and coworkers (2006) found a powerful narrative of successful aging in The Globe & Mail newspaper’s portrayal of aging. This narrative, often cap- tured through interviews with older adults, focused on per- sonal control, the avoidance of disease and disability, and a valuing of successful over unsuccessful agers. Rozanova’s (2010) subsequent research linked successful aging, polar- ized ageism, and the neoliberal contexts of individual responsibility and cost containment. As she explained, [T]he newspaper texts highlight individuals’ public duty to age successfully…and bring a morally-laden message that an … Not Your Parents’ Test Scores: Cohort Reduces Psychometric Aging Effects Elizabeth M. Zelinski and University of Southern California Robert F. Kennison California State University, Los Angeles Abstract Increases over birth cohorts in psychometric abilities may impact effects of aging. Data from 2 cohorts of the Long Beach Longitudinal Study, matched on age but tested 16 years apart, were modeled over ages 55–87 to test the hypothesis that the more fluid abilities of reasoning, list and text recall, and space would show larger cohort differences than vocabulary. This hypothesis was confirmed. At age 74, average performance estimates for people from the more recently born cohort were equivalent to those of people from the older cohort when they were up to 15 years younger. This finding suggests that older adults may perform like much younger ones from the previous generation on fluid measures, indicating higher levels of abilities than expected. This result could have major implications for the expected productivity of an aging workforce as well as for the quality of life of future generations. However, cohort improvements did not mitigate age declines. Keywords cohort aging; longitudinal; cognition; intelligence Over the last 50 years, there have been systematic increases in fluid intelligence measures across birth cohorts in many developed countries (e.g., Flynn, 1987). Despite this finding, the vast majority of studies in cognitive aging (e.g., Salthouse, 2004) have compared people of different ages and generations to estimate aging effects. Their conclusions therefore rest on the assumption that cohort does not bias results. In this paper, we test hypotheses about the role of cohort on age changes on five different cognitive psychometric tests. Cohort- sequential panel data from the Long Beach Longitudinal Study were analyzed over age using latent growth modeling, with cohort effects tested as differences between two panels of participants from the same age ranges but initially tested 16 years apart. Findings of cohort differences in psychometric aging would not only have implications for theories of Copyright 2007 by the American Psychological Association Correspondence concerning this article should be addressed to Elizabeth M. Zelinski, Leonard Davis School of Gerontology, Andrus Gerontology Center, University of Southern California, Los Angeles, CA 90089-0191. [email protected] Elizabeth M. Zelinski, Leonard Davis School of Gerontology, University of Southern California; Robert F. Kennison, Department of Psychology, California State University, Los Angeles. The contributions of the authors were equal. NIH Public Access Author Manuscript Psychol Aging. Author manuscript; available in PMC 2014 September 19. Published in final edited form as: Psychol Aging. 2007 September ; 22(3): 546–557. doi:10.1037/0882-7974.22.3.546. N IH -P A A u th o r M a n u scrip t N IH -P A A u th o r M a n u scrip t N IH -P A A u th o r M a n u scrip t cognitive decline, but may translate into the lengthening of the productive life span, as well as to reduced prevalence of cognitive impairment in late old age. Cohort Change in Intelligence Flynn (1987) reported increases of up to 1.5 standard deviations in reasoning scores between 19-year-olds tested in 1950 and those in 1980. Those tested in 1950 were born during the Great Depression and those in 1980 after World War II. Today, those Depression-era adults would be in their late 70s and postwar adults would be in their late 40s. The mean differences between individuals aged 48 and 78 on reasoning in a cross-sectional study conducted in 2008 would theoretically include that 1.5 standard deviation difference documented at age 19. This would inflate estimates of the 30-year age difference. Such biasing effects could have profound consequences for conclusions about cognitive aging because reasoning, which is considered representative of fluid intelligence, shows earlier and more substantial age declines than tasks that are more representative of crystallized intelligence. (e.g., McArdle, Ferrer-Caja, Hamagami, & Woodcock, 2002). Inflated age estimates could also arise in single-panel longitudinal studies, as they generally include a wide range of ages over a relatively short retest interval and are often analyzed over age rather than measurement occasion (e.g., McArdle et al., 2002). Cohort differences in abilities have been consistently observed in comparisons of different birth groups in multicohort studies such as the Seattle Longitudinal Study (Schaie, 1996). Estimates suggest average increases in reasoning performance for people born in 1910 compared to those born in 1896 (e.g., Schaie, 1996) suggesting that such cohort trends have been a phenomenon of at least the past century. The dramatic rise in fluid reasoning observed by Flynn (1987) is likely to be based on continuous increments that happened to be sampled at a wide time interval (see also Flynn, 2003; Raven, 2000). Despite substantial generational increases in fluid abilities, changes in normative data in children and young adults for more crystallized abilities have been mixed. For example, minimal cohort differences have been reported for the Mill Hill Vocabulary tests (e.g., Raven, 2000) and also for the arithmetic subtest of the Wechsler Intelligence Scale for Children—Revised (Flynn, 2003). Alwin (1991; Alwin & McCammon, 2001) suggested that once effects of education are removed, there is a reversal of the Flynn effect in a population sample, with more recent cohorts poorer in vocabulary ability than earlier born ones. However, this finding may be related to a confound between sampling of particular ages and cohorts in that study; a recent study extending cohort-sequential modeling to the sample and vocabulary test evaluated by Alwin indicated cohort increases (Bowles, Grimm, & McArdle, 2005; see also Wilson & Gove, 1999). Although some theorists disagree whether the Flynn effect is based on actual changes in ability levels or to a lack of psychometric invariance (e.g., Rodgers, 1999)—that is, that differences across cohorts in intelligence exist because the scores do not have the same measurement properties such as equal factor loadings, uniquenesses, and factor intercepts— invariance or at least partial invariance has been established for some indices of fluid abilities across cohorts of children and young adults in developed countries (Wicherts et al., Zelinski and Kennison Page 2 Psychol Aging. Author manuscript; available in PMC 2014 September 19. N IH -P A A u th o r M a n u scrip t N IH -P A A u th o r M a n u scrip t N IH -P A A u th o r M a n u scrip t 2004). Despite disagreements about the broad explanations proposed by Flynn and colleagues (e.g., Dickens & Flynn, 2001) to explain the eponymous effect (Loehlin, 2002; Rowe & Rodgers, 2002), and some recent studies suggesting that the Flynn effect may have recently plateaued or reversed for military conscripts in the 1990s in two Scandinavian countries (e.g., Sundet, Barlaug, & Torjussen, 2004; Teasdale & Owen, 2005), it is likely that the skills underlying fluid ability performance increased during young adulthood for cohorts that are now aging. The most widely cited explanations for the Flynn effect are those of cultural changes, including improvements in nutrition and hygiene, population movement from rural to urban areas, increased access to schooling in the first half of the 20th century, increased educational levels of parents, smaller families, parental engagement in practices that encourage cognitive development (e.g., Williams, 1998), and changes in processing from more characteristically verbal to more iconic representations due to the rise of visually oriented modalities in film, television, computer games, and other media (for descriptions see Greenfield, 1998). Blair, Gamson, Thorne, and Baker (2005) suggested that recent fluid ability increases additionally reflect a shift in the content of mathematical curricula in primary and secondary schools toward fluid-like tasks that involve working memory and improve frontal functioning. The less consistent findings of cohort-related increases for some types of crystallized abilities have also been interpreted as due to historical changes in reinforcement. Instructional time spent imparting traditional school related knowledge has been reduced (see Williams, 1998), and people are more likely to watch movies and television than to read. The visual environment of movies and television promotes basic vocabulary and use of contextualized grammatical structures rather than the more advanced vocabulary and complex, decontextualized grammatical forms of written literature, leading to stable vocabulary scores on intelligence tests yet simultaneously declining verbal SAT scores (e.g., Greenfield, 1998). Consistent with this explanation, Bowles et al. (2005) reported that a cohort-sequential analysis over age showed greater improvement in more recently born cohorts for basic vocabulary items than for advanced ones. In summary, it has been suggested that culture affects the cognitive environment so that cognitive abilities adapt to it (e.g., Barber, 2005). This leads to the hypothesis that discrepancies in cohort effects in older populations will vary to the extent that larger cohort increases will be observed for the fluid-like cognitive skills that have been more emphasized in recent decades than previously, whereas crystallized skills that have been consistently emphasized over the past century would show less cohort change. The fluid/crystallized theory (e.g., Horn & Cattell, 1967) also predicts age effects that parallel the cohort effects, that is, that age declines are larger for fluid than crystallized abilities. However, it is important to vary age and cohort systematically to determine whether the declines attributed to age are confounded with cohort. Zelinski and Kennison Page 3 Psychol Aging. Author manuscript; available in PMC 2014 September 19. N IH -P A A u th o r M a n u scrip t N IH -P A A u th o r M a n u scrip t N IH -P A A u th o r M a n u scrip t Cohort and Aging Although it has been suggested that cohort differences may be responsible for much of the observed age decline in fluid abilities (Raven, 2000), it is not likely that they explain all apparent age-related effects, as there are substantial and reliable declines for a wide range of cognitive abilities with age, including the crystallized-like abilities (e.g., Salthouse, 2004). The finding of consistent age differences across abilities suggests that, if tracked over age, different cohorts would show parallel age declines. However, it is conceivable that cohort would interact with age due to selective attrition. People who drop out from longitudinal studies perform more poorly and tend to be older than those who remain (e.g., Cooney, Schaie, & Willis, 1988; Kennison & Zelinski, 2005). There are also age differences in initial selection into a sample. Simply being willing to participate in cognitive testing signals greater selectivity in older adults because advanced age is associated with higher rates of refusal to complete cognitive tests in a population survey (e.g., Zelinski, Burnight, & Lane, 2001) and in normative studies of intelligence (e.g., Raven, 2000). Even if later-born cohorts are intellectually advantaged, elderly individuals from earlier cohorts may be more select than younger ones just because they have survived to the age at which they are tested (see Rabbitt et al., 2002; Verhaeghen, 2003). Because there are likely to be stronger survival effects in earlier cohorts, more recent cohorts may be less likely to show those benefits because they are relatively less select (e.g., Singer, Verhaeghen, Ghisletta, Lindenberger, & Baltes, 2003). Thus cohort could conceivably have no biasing effect in cross-sectional studies because the cohort advantage may wash out. Age Declines Cohort effects may be implicated in the rate of average decline with age, which is not likely to be constant across the entire span of late adulthood. Neugarten (1975) coined the terms “young-old” (below age 75) and “old-old” (above 75) to differentiate age groups in the elderly population. There are clear age differences between the young-old and the old-old, with worse performance on cognitive tasks in old-old people, even when differences in education and health have been accounted for (e.g., Zelinski, Crimmins, Reynolds, & Seeman, 1998). Longitudinal studies generally report an acceleration of estimated declines in the old-old (e.g., Rabbitt et al., 2002; Singer et al., 2003; Sliwinski, Hofer, Hall, Buschke, & Lipton, 2003). Hypotheses based on the fluid-crystallized distinction suggest greater acceleration of declines in the old-old for more fluid than crystallized ones (Horn & Cattell, 1967), which has been supported longitudinally (e.g., Singer et al., 2003). Thus it is important to evaluate change across a wide range of ages in late adulthood. Interval Scaling Tests of the generality of the Flynn effect require direct comparisons across cognitive measures. However, with raw scores, it is impossible to determine whether an age or cohort difference of, say, 5 points on a memory task is equivalent to a difference of 5 points on a reasoning test. Another problem with raw scores is that across individuals, differences between scores on the same test may not be equivalent at different points of the scale Zelinski and Kennison Page 4 Psychol Aging. Author manuscript; available in PMC 2014 September 19. N IH -P A A u th o r M a n u scrip t N IH -P A A u th o r M a n u scrip t N IH -P A A u th o r M a n u scrip t (Wright & Stone, 1979). For example, the 2-point difference between scores of 20 and 18 on a 20-item recall task may not be interpreted as reflecting the same amount of difference in performance as the difference between scores of 14 and 12, or 2 and 0, even though the relative ordering of individuals’ scores is clear. This is a problem for testing interactions, where assumptions of statistical tests require that scores are equivalent across their full range (Embretson, 1996). Mathematical transformations of raw scores, such as z scores or proportion correct, do not redistribute them so that differences between points on the scale are equal (Wright & Stone, 1979). However, Rasch scaling can be applied to data to assure equivalence of scores across tests and persons by using an algorithm that treats item difficulty and person ability separately. It ensures that the differences between scores at every point of the scale are the same and that these differences can be directly compared across variables through logistic transformation (see, e.g., Zelinski & Gilewski, 2003). Thus, whether age declines accelerate differentially across psychometric tests has only been directly evaluated by McArdle et al. (2002), who used the Rasch scaled Woodcock-Johnson test battery. They found smaller declines that occur later in the life span for crystallized abilities than for more fluid ones for people under age 75. In the present study, Rasch scaled scores were used for five measures that are likely to show differential cohort and age patterns. We evaluated decline patterns in people ages 55–87 and tested the hypothesis that average decline accelerates with age. We estimated changes with age and cohort independently with cohort-sequential analyses (Schaie, 1965). Two longitudinal panels, which were treated as different cohorts studied over the same range of ages but born 16 years apart, were examined to determine whether patterns of decline are similar, even if there are cohort differences in performance at the intercept. Schaie’s (1996) longitudinal estimates, as well as cross-sectional estimates in standard score scaling for similar tasks by Salthouse (2004), suggest that slopes of age declines should be comparable for reasoning and space. Using the same items and time restrictions for the vocabulary test as Schaie, we expected that the age effect for vocabulary would be similar to those of the other psychometric tests largely because that test has a strong speed component (Hertzog, 1989; Zelinski & Lewis, 2003). Yet only small cohort effects were anticipated because the vocabulary subtest of the Schaie–Thurstone Adult Mental Abilities Test (STAMAT; Schaie, 1985) is of a crystallized-like ability. Extrapolating from Schaie’s and Salthouse’s estimates, we expected accelerating age changes for vocabulary, space, and reasoning. Both Schaie’s and Salthouse’s estimates suggest minimal acceleration of decline in late old age for recall tasks. Method The Long Beach Longitudinal Study design, participants, and measures are described in detail elsewhere (Zelinski & Burnight, 1997; Zelinski & Lewis, 2003). Participants are volunteers residing in the communities of Long Beach and Orange County, California. The convenience sample shows performance characteristics similar to a representative sample of older Americans who have at least a high school education (e.g., Zelinski, Burnight, & Lane, 2001). This suggests that the sample represents the upper levels of older adult performance. Zelinski and Kennison Page 5 Psychol Aging. Author manuscript; available in PMC 2014 September 19. N IH -P A A u th o r M a n u scrip t N IH -P A A u th o r M a n u scrip t N IH -P A A u th o r M a n u scrip t Participants The data of two cohorts of participants varying in age from 55–87 were used for the analyses. Cohort 1 participants (baseline n = 456) were born between 1893 and 1923 and were tested on as many as five test occasions in 1978, 1981, 1994, 1997, and 2000 (see top panel of Table 1). Cohort 2 participants (baseline n = 482) were born between 1908 and 1940 and were tested up to four times in 1994, 1997, 2000, and 2003. It is important to note that the overlap in the birth years of the two cohorts does not confound comparisons because the age matching held the 16-year cohort difference constant. However, Cohort 1 participants could have an advantage because they had been in the study longer than Cohort 2. To determine whether there might be retest effects for Cohort 1 participants in 1994, when Cohort 2 was initially tested, participants aged 71–87 were compared on their 1994 scores. There were 76 individuals from Cohort 1 and 294 from Cohort 2 in the analyses of variance. There were no differences on four of the tasks with Fs(1, 368) ranging from 0.0 to 2.7; however, Cohort 1 participants had significantly better 1994 scores on reasoning, F(1, 368) = 5.8, p < .05, suggesting minimal retest bias. The mean baseline age for Cohort 1 (M = 69.81, SD = 7.17) was reliably younger than for Cohort 2 (M = 72.15, SD = 8.46), F(1, 935) = 20.81, MSE = 61.74. Members of Cohort 1 (M = 12.54, SD = 2.76) reported fewer years of formal education than Cohort 2 (M = 13.69, SD = 2.94), F(1, 935) = 36.42, MSE = 8.12. Cohort 1 consisted of 53.3\% women and Cohort 2 consisted of 47.8\% women; there were no differences in gender representation across cohorts, χ2(1, N = 937) = 0.08. Test intervals were approximately 3 years apart with the exception of a 13-year interval between the second (1981) and third (1994) testings of Cohort 1. The irregularity of this interval is assumed to have no undue influence on data modeling because the data were analyzed over age rather than time. In addition, Zelinski and Burnight (1997) reported no differences in 1978 scores for Cohort 1 participants who returned in 1994, regardless of whether they were tested in 1981 or not. All had better initial scores than permanent dropouts. This suggests general selection effects for Cohort 1 participants returning in 1994 rather than practice effects. Psychometric Tests Five measures of cognitive performance were examined. Three of them were from the STAMAT: Recognition Vocabulary, reasoning (Letter and Word Series), and space (Figure and Object Rotation). Recognition Vocabulary required selection of definitions for 50 target words from an array of four choices in 4 min. Reasoning was a composite score of the STAMAT Letter and Word Series tests. Letter Series required selection of the next item in 30 series, such as a b c c b a d e f f e, in 6 min, and Word Series was a parallel version with items using days of the week and months. Space was a composite score of the STAMAT Figure and Object Rotation tests. In these tasks, participants had 6 min to select up to three rotations of a target from an array of six choices. The items for Figure Rotation were abstract line figures, whereas those for Object Rotation were line drawings of common household items such as a bleach bottle. There were 20 items in this test. List recall was immediate written recall of a list of 20 concrete high-frequency nouns. The words were Zelinski and Kennison Page 6 Psychol Aging. Author manuscript; available in PMC 2014 September 19. N IH -P A A u th o r M a n u scrip t N IH -P A A u th o r M a n u scrip t N IH -P A A u th o r M a n u scrip t presented on a sheet of paper and participants were given 3.5 minutes to study the list. The test was not timed. Text recall involved immediate written recall of a 227-word passage containing 104 idea units. The passage was read by participants while they also listened to an audio reading of it presented at a rate of approximately 155 words per minute. The proportion of idea units correctly recalled according to the parsing model of Turner and Greene (1977) was the dependent measure of text recall. Rasch Scaling Interval measurement scaling is based on the following equation (Rasch, 1966): (1) where fni1 is the person n’s probability of scoring 1 rather than 0 on item i, bn is the ability of person n, and di1 is the difficulty of the item. Rasch scaling assumes that the construct being measured is unidimensional; difficulty of items on a cognitive test is consistent with ability such that correct scores on more difficult items reflect greater ability and more difficult items always have a lower probability of being correctly answered than less difficult ones, independent of person ability. It also assumes that individuals with greater levels of ability will be more likely to score correct on more items. They always have a higher probability of correctly answering any item, independent of item difficulty, than those with low ability (Wright & Stone, 1979). In Rasch scaling, person parameters are conditioned out of the model when item difficulties are being calibrated, and item parameters are conditioned out of the model when person parameters are being calibrated by repetitive inversion of the items and persons data matrix. Items are ordered by difficulty and persons by ability, with maximum-likelihood modeling used to identify items that best discriminate responses and people from one another. The most discriminating items are those that have an equal likelihood of obtaining a correct or incorrect response at a given level of ability. The logarithmic transformations of the item and person data shown in Equation 1 convert the ordinal data into interval data. The size of the intervals is determined by the item and person performance probabilities. Rasch scaled person scores are log odds units or logit scores representing the 50\% probability of responding correctly to items at the level of ability, 75\% probability of being able to respond correctly to items 1 logit below the ability level, and 25\% probability of being able to respond correctly to items 1 logit above the ability level (Bond & Fox, 2001). When data are rescaled, the logit properties remain but vary with the scaling factors used to create the desired score properties. For example, rescaling list recall in the present study from a logistic score with a mean of 0 to a 0–100 range involved rescaling the logit units from 1 to 11.15. Thus, if a participant declined 11.15 points, that would indicate a 25\% probability of responding to items that previously would have been associated with a 50\% probability. An increase of 11.15 points on the recall task would indicate a 75\% probability of responding correctly to items associated with a 50\% probability previously. Fit indexes for Rasch analyses are computed separately for persons and items. They use mean squares to show the amount of distortion in the data relative to the Rasch model. The Zelinski and Kennison Page 7 Psychol Aging. Author manuscript; available in PMC 2014 September 19. N IH -P A A u th o r M a n u scrip t N IH -P A A u th o r M a n u scrip t N IH -P A A u th o r M a n u scrip t expected value of the mean squares is 1.0. Values substantially less than 1.0 indicate underfit, with possible unmodeled noise in the data; values substantially greater than 1.0 indicate overfit. Values between 0.5 and 1.5 are productive for measurement, and those between 1.5 and 2.0 are unproductive but suggest that the measurement is not degraded; values over 2.0 are problematic (Linacre, 2006). The infit mean square is a fit statistic sensitive to unexpected patterns of observations made by persons on items at their approximate ability level and by items on persons at the item’s approximate difficulty level. The outfit mean square is a fit statistic sensitive to unexpected observations made by persons on items that are expected to be either very easy or very difficult or by items on persons of very low or high ability. The overall root-mean-square error (RMSE) for the model is the square root of the average error variance computed over persons or items. It indicates the upper limit to the reliability of measures based on the items and persons sampled (Linacre, 2006). Reliabilities are computed separately across persons and items, in contrast to reliabilities such as Cronbach’s alpha, which is computed for persons only. However, the values of the person and item reliabilities are interpreted as is alpha, with values close to 1 indicating high reliability. The WINSTEPS Rasch measurement program Version 3.61.1 (Linacre, 2006) was used for the interval scaling. Individual items for all tasks were the units of analysis, that is, a 1 (correct) or 0 (incorrect) for each item on each test. For the recall tasks, each word or proposition in the study materials served as an item. Item scores within each test were calibrated with the data stacked over occasions and cohorts so that each observation for a particular subject was treated as independent, as would be done in the computation of z scores over occasions. Scores were initially scaled so that at the item level they had a mean of zero. The relative range of mean age performance could be identified from the person ability scores. Table 2 provides fit information for the Rasch calibration of each of the five tests. All results were good fitting and discriminating based on their infit and outfit mean squares, low RMSEs, and high reliability for individuals and for items. Examples of interval item scores converted from raw total scores for list recall and a mental status test are found in Zelinski and Gilewski (2003). For the analyses, we rescaled the Rasch item scores from the logistic scores to a 0–100 range to increase interpretability. The rescaled means (and standard deviations) of the person scores were, for reasoning, M = 39.66 (13.07); list recall, M = 54.78 (12.67); text recall, M = 40.29 (7.30); space, M = 63.72 (5.83); and vocabulary, M = 68.25 (15.18). The scaling factors for the logits were 6.12, 11.15, 7.80, 6.72, and 7.4, respectively. Longitudinal Analysis We used growth modeling (McArdle & Bell, 2000) with the Mplus program (Version 4.2; Muthén & Muthén, 1998–2007) to test hypotheses about age and cohort differences in longitudinal performance on the Rasch-scaled measures. The models were fit to data configured over 3-year age “buckets” to increase the number of observations for the ages studied (e.g., Bowles et al., 2005). The 3-year age ranges at which people were tested were treated as manifest variables, and those age ranges at which they were not tested as latent variables. The ranges were 55–57, 58–60, 61–63, 64–66, 67–69, 70–72, 73–75, 76–78, 79– Zelinski and Kennison Page 8 Psychol Aging. Author manuscript; available in PMC 2014 September 19. N IH -P A A u th o r M a n u scrip t N IH -P A A u th o r M a n u scrip t N IH -P A A u th o r M a n u scrip t 81, 82–84, and 85–87. For simplicity, we refer to these age buckets by the middle value for a given bucket. For example, the 73–75 bucket will be referred to as age 74. Growth models that utilize maximum likelihood methods provide accurate parameter estimates even with missing data, provided that the missing at random assumption is met (e.g., McArdle & Hamagami, 1991; Schafer, 1997). This assumption requires that missingness can be estimated from the data included in the analyses. Logistic regression analyses predicting dropout from the study by the fourth testing were conducted to aid in the selection of … 613 Copyright 2002 by The Gerontological Society of AmericaThe Gerontologist Vol. 42, No. 5, 613–620 Vol. 42, No. 5, 2002 Rowe and Kahn’s Model of Successful Aging Revisited: Positive Spirituality—The Forgotten Factor Martha R. Crowther, PhD, MPH, 1 Michael W. Parker, DSW, 2 W. A. Achenbaum, PhD, 3 Walter L. Larimore, MD, 4 and Harold G. Koenig, MD 5 Purpose: We explain a new concept, positive spirituality, and offer evidence that links positive spirituality with health; describe effective partnerships between health professionals and religious communities; and summa- rize the information as a basis for strengthening the exist- ing successful aging model proposed by Rowe and Kahn. Design and Methods: A missing component to Rowe and Kahn’s three-factor model of successful aging is identified, and we propose strengthening the model with a fourth factor, positive spirituality. Results: We devel- oped an enhanced model of successful aging based on Rowe and Kahn’s theoretical framework. Evidence pre- sented suggests that the addition of spirituality to interven- tions focused on health promotion has been received positively by older adults. Implications: Leaders in ger- ontology often fail to incorporate the growing body of sci- entific evidence regarding health, aging, and spirituality into their conceptual models to promote successful aging. The proposed enhancement of Rowe and Kahn’s model will help health professionals, religious organizations, and governmental agencies work collaboratively to pro- mote wellness among older adults. Key Words: Religion, Faith-based interventions, Churches, Older adults The spiritual dimension of older adults has not been integrated into promising intervention models that promote successful aging. The lack of interest in issues of spirituality and aging may be analogous to the unwillingness of older people to act upon or com- ply with prescribed treatments. “As we find ways to improve the lives of older people and ameliorate the diseases which afflict them, we are also confronted by the reality that we are often unable to successfully uti- lize these discoveries” (Antonucci, 2000, p. 5). As a means of consolidating knowledge and prac- tice, the MacArthur Foundation offered a promising set of studies on successful aging. In summarizing the findings, Rowe and Kahn’s (1998) model provided scientifically grounded parameters for understanding health across the life course and goals for construct- ing a framework for interventions. However, despite the advantages of their model, it does not incorporate research in the area of spirituality and health that would strengthen it as a framework for promoting successful aging interventions. This article has two aims. First, to assert that spirituality is an important component of health and well-being outcomes among older adults. Second, to argue for interventions which incorporate spirituality with underserved populations as a guide to health professionals, religious organiza- tions, and governmental agencies. Clarifying Concepts Part of the problem with incorporating spirituality into scientific thinking has been the confusion associ- ated with the terms religion and spirituality (Krause, 1993). When descriptive adjectives like intrinsic or extrinsic are added, the problem is compounded. Re- ligious variables in early research were typically lim- ited to declarations of nominal religious affiliation or were totally excluded from consideration (Larson, Pattison, Blazer, Omran, & Kaplan, 1986). There is a need to define and distinguish spirituality and religion so that research can proceed with greater clarity and consistency. In support of this clarification, we use definitions offered by Koenig and colleagues (Koenig, McCullough, & Larson, 2000), and we define a new term— positive spirituality . The distinctions between Although the views expressed in this article are the exclusive opinions of its authors, we gratefully acknowledge the assistance of The John A. Hartford Foundation’s Geriatric Social Work Faculty Scholars Program. Address correspondence to Martha R. Crowther, PhD, MPH, The Uni- versity of Alabama, Department of Psychology, Box 870348, Tuscaloosa, AL 35487-0348. E-mail: [email protected] 1 Department of Psychology, The University of Alabama, Tuscaloosa. 2 Department of Social Work, The University of Alabama, Tuscaloosa. 3 College of Humanities, Fine Arts and Communication, The University of Houston, TX. 4 Focus on the Family, Colorado Springs, CO. 5 Duke University Medical Center, and GRECC, VA Medical Center, Durham, NC. Downloaded from https://academic.oup.com/gerontologist/article-abstract/42/5/613/653590 by guest on 10 February 2018 614 The Gerontologist religion, spirituality, and positive spirituality are de- scribed below and in Table 1. Religion.— “Religion is an organized system of be- liefs, practices, rituals and symbols designed (a) to fa- cilitate closeness to the sacred or transcendent (God, higher power, or ultimate truth/reality), and (b) to foster an understanding of one’s relation and respon- sibility to others in living together in a community” (Koenig et al., 2000, p. 18). Spirituality.— “Spirituality is the personal quest for understanding answers to ultimate questions about life, about meaning, and about relationship to the sa- cred or transcendent, which may (or may not) lead to or arise from the development of religious rituals and the formation of community” (Koenig et al., 2000, p. 18). Positive Spirituality.— Positive spirituality involves a developing and internalized personal relation with the sacred or transcendent that is not bound by race, ethnicity, economics, or class and promotes the well- ness and welfare of self and others. Positive spiritual- ity uses aspects of both religion and spirituality. It also incorporates the work of the Fetzer work groups, which suggests that religion and spirituality are mul- tidimensional constructs (Fetzer Institute, 1999). Our focus extends the contributions of the Fetzer work groups, namely, to capture health-relevant domains of religiousness and spirituality, by focusing on only positive aspects of spirituality or religion within the context of a conceptual model related to successful aging. The addition of positive spirituality to Rowe and Kahn’s model of successful aging helps bridge the gap between theory and practice at a time when the Congressional and Executive branches of the gov- ernment are enacting rules for collaboration between government and the faith community in serving the poor (e.g., Personal Responsibility and Work Oppor- tunity Reconciliation Act, 1996). To discuss more fully what we mean, it becomes necessary to address what positive spirituality is not. There is general agreement that certain religious be- liefs and activities can adversely affect both mental and physical health (Koenig, 2001). Spirituality may be restraining rather than freeing and life enhancing (Pruyser, 1987). Religious beliefs have been used to jus- tify hypocrisy, self-righteousness, hatred, and prejudice. The aspects of spirituality or religion that separate people from the community and family (e.g., hypocrisy, self-righteousness), or that encourage unquestioning devotion and obedience to a single charismatic leader, or promote religion or spiritual traditions as a healing practice to the total exclusion of any medical care, are likely to adversely affect health over time. For exam- ple, we would not suggest that Reverend Jim Jones and the Guyana mass suicide of nearly 900 people, the David Koresh cult in Waco, Texas, or the terrorist attack on September 11th that destroyed the World Trade Center Towers were guided by positive spiritu- ality. Many Western and Eastern religious traditions emphasize an intimate relation with a transcendent force, place high value on personal relations, stress re- spect and value for the self, yet place emphasis on hu- mility. The resulting emphasis on relations—relation to a transcendent force, to others, and to self—may have important mental health consequences, especially in regard to coping with the difficult life circumstances that accompany poor health and chronic disability. Positive spirituality may reduce the sense of loss of control and helplessness that accompanies illness. Positive spiritual beliefs provide a cognitive frame- work that reduces stress and increases purpose and meaning in the face of illness. Spiritual activities like prayer and being prayed for may reduce the sense of isolation and increase the patient’s sense of control over illness or disease. Public religious behaviors that improve coping during times of physical illness in- clude, but are not limited to, participating in worship services, praying with others (and having others pray for one’s health), and visits from religious leaders Table 1. Distinctions Between Religion, Spirituality, and Positive Spirituality Religion Spirituality Positive Spirituality Community focused Individualistic Seeks to identify those features of religion and spirituality that have yielded or are associated with positive outcomes. The blend between community focused and individualism. Observable, measurable, organized and/or more extrinsic Less visible and measurable, more subjective and/or more intrinsic Measurable, extrinsic, and intrinsic Formal, orthodox, organized Less formal, orthodox Less formal, orthodox, and systematic Behavior oriented, outward practices Emotionally oriented, inward directed Emotion and behavior oriented Authoritarian in terms of behavior Not authoritarian, little accountability Accountable to engaging in positive actions Doctrine separating good from evil Unifying, not doctrine oriented Unifying, promoting life enhancing beliefs Downloaded from https://academic.oup.com/gerontologist/article-abstract/42/5/613/653590 by guest on 10 February 2018 615Vol. 42, No. 5, 2002 such as a chaplain, pastor, priest, or rabbi at home or in the hospital. Rowe and Kahn’s Model of Successful Aging and Positive Spirituality In their original model, Rowe and Kahn (1987) de- fined successful aging as the avoidance of disease and disability. More recently they have expanded their model to include maintenance of physical and cogni- tive function and engagement in social and produc- tive activities (Rowe & Kahn, 1997, 1998), making it ready for future intervention studies (Riley, 1998). However, their notion of successful aging has not been without criticisms. Rowe and Kahn’s (1998) model has been criticized for not emphasizing biological research (Masoro, 2001) and for not including social structure and self- efficacy (Riley, 1998). We argue that the social and bi- ological components to aging successfully are portrayed adequately within the existing model as “avoidance of disease and disability” and “active engagement with life” (Rowe & Kahn, 1998, p. 39). Additionally, we agree with Rowe and Kahn (1998) that self-efficacy, as a psychological construct, properly rests within their original conceptualization of cognitive and men- tal fitness, and that it does not represent a separate, distinct component to successful aging. Although we maintain that Rowe and Kahn’s (1998) synthesis of the literature addresses these crit- icisms adequately without necessary modification of their framework, their model falters systemically on two counts. First, their work does not endorse the growing body of research examining the relation be- tween spirituality and health outcomes (see reviews by Levin, 1996; Matthews & Larson, 1995). Spiritu- ality has been associated with an improvement in sub- jective states of well-being (Ellison, 1991), a reduc- tion in levels of depression and distress (Williams, Larson, Buckler, Heckmann, & Pyle, 1991), a reduc- tion in morbidity, and an increase in life span (Levin, 1996). Second, their neglect of spirituality as a major construct handicaps their call for efficacious applica- tions with their model. National surveys have consis- tently shown that the vast majority of older Ameri- cans, in particular ethnic and minority elders, report a religious or spiritual component to their lives (Prince- ton Religious Research Center, 1987, 1994). In the following section, we introduce positive spir- ituality into Rowe and Kahn’s (1998) model, as illus- trated in Figure 1. We maintain that this expanded model will enhance the percentage of older adults who age successfully by affirming an important and positive aspect in the lives of many older Americans, while in no way disenfranchising those to whom spir- ituality is not important. Furthermore, the theoretical incorporation of spirituality into models of successful aging represents an important scientific acknowledge- ment of the research findings of the past four decades. Rowe and Kahn’s model has three components: (a) minimizing risk and disability, (b) engaging in active life, and (c) maximizing physical and mental activi- ties. The three components of the model have the fol- lowing characteristics: (a) each is a part of an overall system and each is therefore temporally related to the others, (b) the variables are activating characteristics that describe both weaknesses and strengths, and (c) each must consider both individual characteristics as well as contextual factors. We argue that positive spir- ituality is the missing component in the model; it ad- dresses the interrelatedness between the older adults’ beliefs and values, the community, and the efficacy of interventions focused on successful aging. Rowe and Kahn (1997) indicated that the stage is set for intervention studies to identify effective strate- gies that enhance wellness among older adults. We maintain, with our broadened Rowe and Kahn model, that aging is multifaceted and consists of interdepen- dent biological, psychological, social, and spiritual processes. Further, we assume that lives are lived within a social and historical context, and that the re- lation between individuals and society is multidimen- sional and interactive. For example, positive spirituality fosters active engagement in life, through religious and/ or community activities, prayer, meditation, and other practices. In addition, the literature has found an association between spiritual and/or religious ac- tivities and the reduction in disability and disease, thus allowing seniors to remain actively engaged. The intellectual acceptance of spirituality as a major facet of life will help reopen doors of opportu- nity with groups who have avoided or become reluc- tant recipients of traditional health promotion in- terventions. A person’s spirituality is not bound by race and socioeconomic status, and its acceptance in theory will provide gerontologists the option of considering spiritual tools and paradigms in design- ing efficacious, evidence-based health promotion in- terventions that cut across traditional racial, ethnic, and economic boundaries. Positive Spirituality and Wellness Except for the past two centuries, religion and med- icine have been closely linked for most of recorded history. Yet until nearly the end of the 20th century, science has not seriously studied the relation between measures of religion, spirituality, health, and aging (Koenig, 1999; McFadden, 1996). Because of the grow- ing recognition that religious and spiritual beliefs and Figure 1. Revised Rowe and Kahn Model of Successful Aging. Downloaded from https://academic.oup.com/gerontologist/article-abstract/42/5/613/653590 by guest on 10 February 2018 616 The Gerontologist practices are widespread among the American popula- tion and that these beliefs and practices have clinical rel- evance, professional organizations are increasingly call- ing for greater sensitivity and better training of clinicians concerning the management of religious and spiritual is- sues in assessment, treatment, and research (Accredita- tion Council for Graduate Medical Education, 1994; American Psychiatric Association, 1995; American Psy- chological Association, 1992; Council on Social Work Education, 1995; The Joint Commission on the Accred- itation of Healthcare Organizations in 1996, 2001). Positive Spirituality, Psychological, and Physical Health Outcomes There are multiple psychological, social, behav- ioral, and physiological mechanisms by which reli- gious involvement may impact health and speed re- covery from disease. Several researchers have found that religious activity—particularly when it occurs in the setting of community such as involvement in reli- gious worship services—and related voluntary activ- ity is associated with longer life span (Glass, Mendes de Leon, Marottoli, & Berkman, 1999; Hummer, Rogers, Nam & Ellison, 1999; Oman & Reed, 1998). Additionally, several studies have shown a positive as- sociation between religious involvement and better adaptation to medical illness (Ell, Mantell, Hamo- vitch, & Nishimoto, 1989; Jenkins & Pargament, 1995; Kaczorowski, 1989) or to the burden of caring for those with medical illness (Keilman & Given, 1990; Rabins, Fitting, Eastham, & Zabora, 1990). Religious activity has also been associated with better compliance with antihypertensive therapy (Koenig, George, Cohen, et al., 1998). Religiously committed persons are less likely to en- gage in health behaviors like cigarette smoking and excessive alcohol use (Koenig et al., 2000). In this way, religion may help to prevent the negative health consequences that follow these unhealthy behaviors. On the other hand, these persons are often involved in close family systems and supportive communities, which may have effects on health through other ex- planatory mechanisms. Level of religious commitment also predicts speed of recovery from depression regardless of initial de- pression severity, an effect that is strongest in those with chronic physical disability that is not responding to medical therapies (Koenig, George, & Peterson, 1998). A positive association between religious in- volvement and mental health in persons with physical disability has also been found in studies of hospital- ized medical patients (Idler, 1995; Larson, 1993). Sim- ilarly, studies of mental health and substance abuse have shown that religious activity buffers against the negative effects of physical illness or stressful life events (Kendler, Gardner, & Prescott, 1997). Nearly 850 studies have now examined the relation between religious involvement and some indicator of mental health. Many of the studies have been conducted in medically ill patients or older persons suffering with chronic disability. The vast majority of such studies do indeed find that religious involvement is associated with greater well-being and life satisfaction, greater purpose and meaning in life, greater hope and opti- mism, less anxiety and depression, more stable mar- riages and lower rates of substance abuse (Koenig, McCullough, & Larson, 2000). Religious Coping, Psychological, and Physical Health Outcomes In an examination of the association between reli- gious coping and depression, Koenig and colleagues (1995) found that religious coping may reduce the af- fective symptoms of depression, but appeared less ef- fective for the biological symptoms that are probably more responsive to medical treatments. More re- cently, Koenig and collaborators examined the associ- ation between 21 types of religious coping and a host of physical and mental health characteristics (Koenig, Pargament, & Nielsen, 1998). Offering religious help to others (e.g., praying for others) was one of the most powerful predictors of high quality of life, low depressive symptoms, greater level of cooperativeness, and greater stress-related growth. Other types of reli- gious coping associated with positive mental health in- cluded reappraising God as benevolent, collaborating with God, seeking a connection with God, and seek- ing support from clergy or other church members. These coping behaviors were strongly related to stress-related growth, enabling patients to experience greater psychological growth from these stressful health problems. Coping behaviors that focused pri- marily on the self (self-directed coping) without de- pending on God, were related to greater depression, lower quality of life, and significantly lower stress- related growth. Some studies show that religious cop- ing is also associated with improved attendance at scheduled medical appointments (Koenig, 1995). Several studies report an association between reli- gious involvement and immune system function. Dull and Skokan (1995) developed a cognitive model to explain the relation between spirituality and the im- mune system. In their model they posit that spiritual- ity is a complex system of beliefs that can have an im- pact on all aspects of an individual’s daily life. Spiritual practices may affect a person’s cognitions and subsequently impact health practices and out- comes. For example, a cancer patient with spiritual beliefs may assign a larger meaning to the illness, thus reducing the negative effects of stress on health. Investigations in patients with AIDS show that those who are more involved in religious activities have measurably stronger immune function (Woods, Antoni, Ironson, & Kling, 1999). Likewise, studies at Stanford University in patients with breast cancer show better immune functioning among women with greater religious expression (Schaal, Sephton, Thore- son, Koopman, & Spiegel, 1998). The findings pre- sented above suggest a positive association between re- ligion and reduced levels of psychological stress and could point to physiological consequences that impact physical health as well. However, this research is in its Downloaded from https://academic.oup.com/gerontologist/article-abstract/42/5/613/653590 by guest on 10 February 2018 617Vol. 42, No. 5, 2002 earliest stages, with the results highly preliminary and not definitive. Prospective studies and clinical trials are needed to determine the order of the effects. The Role of Positive Spirituality in Health Promotion Health promotional efforts are designed to trans- form the more traditional biomedical models that ac- centuate the physician’s responsibility to treat disease, to an ideal in which individuals are increasingly respon- sible for optimizing their health by attending to the quality of their self-care. Hooyman and Kiyak (1999) suggest that health promotion makes “explicit the im- portance of people’s environments and lifestyles as determinants of their health status” (p. 117). As a re- flection of and in reaction to the aging demography of America and the world, the American Association for World Health (1999) has adopted the theme, “Healthy Aging, Healthy Living—Start Now.” Prac- titioners have not used specified exercises for self- care consistently in the development of innovative wellness initiatives (Prochaska & DiClemente, 1984; Prochaska, Velicer, DiClemente, & Rossi, 1993). Only rarely and recently are the implications of these re- search domains considered in the development of well- ness and health promotion programs (Parker, Fuller, Koenig, Bellis, Vaitkus, & Eitzen, 2001). The National Academy on an Aging Society (2000) has released information that portrays the health pro- motional challenge with seniors. Almost all of the at- risk conditions are associated with chronic illnesses such as hypertension, heart disease, diabetes, cancer, and stroke. Though many older people are at risk for chronic conditions because of genetic predisposition, gender and age, many risk factors are related to mod- ifiable health behaviors. Can religious and spiritually minded organizations participate more actively in these efforts? Can they help fill the void in funding of intervention initiatives? We offer evidence to support these assertions. The role religious organizations can play and have played in providing support for aging members in the com- munity and hospital has often been overlooked or not acknowledged in the literature on successful aging. Religious communities have the most valuable re- source in society—people. By supporting community- dwelling older adults and their caregivers, religious communities could potentially reduce both the length and frequency of hospital admissions and perhaps delay nursing home placement. Religious denominations, spiritually minded nonprofit organizations, ecumenical groups, churches, synagogues, and other religious in- stitutions represent viable sources that can be engaged in partnerships that provide health promotional and prevention opportunities to groups that are more diffi- cult to reach (Parker et al., 2000; Parker et al., 2002). Models of Intervention That Incorporate Positive Spirituality The African American religious community has helped establish the connection between health pro- motion and spirituality. In their 20-year review of lay health advisor programs among African Americans, Jackson and Parks (1997) reviewed the growing lay health advisor movement. Among their findings was the recommendation that professional educators should rely on the collective wisdom of the commu- nity to identify, recruit, select, and train lay health ad- visors, and they cite a number of studies that confirm the value of seeking the collective wisdom of the Afri- can American religious community in health promo- tional outreach programs. Smith, Merritt, and Patel (1997) examined the im- pact of education and support provided by African American churches in encouraging health promotion activities for blood pressure management. In a related program, Kong (1997) described a community-based program, which included churches, that played a valuable role in increasing the number of African American hypertensives that received treatment. There is also evidence that supports the role of minis- ters in providing assistance for African Americans (Okwumabua & Martin, 1997; Neighbors, Musick, & Williams, 1998). Jackson and Reddick (1999) describe the Health Wise Church Project, a community outreach initiative between a diverse group of African American churches and a university health education program. The pri- mary objective was to develop early detection and ill- ness prevention networks among older church mem- bers. Their four-stage model for the establishment of academic–church collaborations is similar to a model used by Parker and colleagues (2000, 2001), which adopted the Rowe and Kahn model of successful ag- ing with the addition of positive spirituality. As illus- trated in Figure 2, we have taken the Parker and col- leagues model and adapted it for use with faith-based and non–faith-based organizations. This model is a unifying theoretical framework that fosters interdisci- plinary thinking as well as program development and research in the area of health promotion. The model demonstrates how prevention information can be dis- seminated to older adults by gaining access to com- munity organizations. The inclusion of both faith and non–faith-based organizations captures older persons who consider themselves spiritual but do not associ- ate with organized religion. The model considers a variety of social, biological, cultural, and economic factors that influence health and health behavior. Experts recommend diet and ex- ercise to alter individual health practices, to create healthier environments, and to enlighten attitudes and expectations toward health (Rowe & Kahn, 1998). By interacting with older adults through faith and non–faith-based organizations as proposed in the model, the more traditional biomedical models that accentuate the physician’s responsibility to treat dis- ease are transformed to an ideal in which individuals are increasingly responsible for optimizing their health by attending to the quality of their self-care (Hooyman & Kiyak, 1999). Faith and non–faith-based organizations can work across denominational and racial boundaries Downloaded from https://academic.oup.com/gerontologist/article-abstract/42/5/613/653590 by guest on 10 February 2018 618 The Gerontologist Figure 2. Proposed model for community-level health promotion for seniors. Downloaded from https://academic.oup.com/gerontologist/article-abstract/42/5/613/653590 by guest on 10 February 2018 619Vol. 42, No. 5, 2002 in conjunction with public and private health care providers and academia and research organizations to forge partnerships. These partnerships can provide the impetus and resources necessary for communities to organize conferences, programs, or workshops that promote successful aging. This model symbolizes the potential of community partnerships in address- ing institutional forms of diversity that limit outreach with disadvantaged groups. The unifying framework proposed marks a needed reversal in the trend towards separation of spirituality, organized religion, non– faith-based institutions, academia, and health care pro- fessionals that has occurred over the past several years. Conclusion We have briefly … The Forum Copyright 1997 by The Cerontological Society of America The Cerontologist Vol. 37, No. 4, 433-440 Substantial increases in the relative and absolute number of older persons in our society pose a challenge for biology, social and behavioral science, and medicine. Successful aging is multidimensional, encompassing the avoidance of disease and disability, the maintenance of high physical and cognitive function, and sustained engagement in social and productive activities. Research has identified factors predictive of success in these critical domains. The stage is set for intervention studies to enhance the proportion of our population aging successfully. Key Words: Aging, Cognition, Physical function, Engagement, MacArthur Foundation Successful Aging1 John W. Rowe, MD2 and Robert L Kahn, PhD3 In an earlier article (Rowe & Kahn, 1987), we pro- posed the distinction between usual and successful aging as nonpathologic states. Our purpose in doing so was to counteract the longstanding ten- dency of gerontology to emphasize only the distinc- tion between the pathologic and nonpathologic, that is, between older people with diseases or dis- abilities and those suffering from neither. The im- plicit assumption of that earlier gerontology was that, in the absence of disease and disability, other age-related alterations in physical function (such as increases in blood pressure and blood glucose) and Cognitive function (such as modest memory impair- ment) were normal, determined by intrinsic aging processes, primarily genetic, and not associated with risk. We hoped that the distinction between two groups of nondiseased older persons — usual (non- pathologic but high risk) and successful (low risk and high function) — would help to correct those ten- dencies, stimulate research on the criteria and deter- minants of successful aging, and identify proper tar- gets for interventions with normal elderly. In recent years, successful aging has. become a famil- iar term among gerontologists (Abeles, Gift, & Ory, 1994; Baltes & Baltes, 1990; Garfein & Herzog, 1995; Hazzard, 1995) and a considerable body of research has accumulated on its characteristics. Much of this work was supported by the MacArthur Foundation Supported by the John D. and Catherine T. MacArthur Foundation, Chicago, IL Address correspondence to John W. Rowe, MD, President, Mount Sinai School of Medicine and The Mount Sinai Hospital, Mount Sinai Medical Center, One Custave L. Levy Place, New York, NY 10029. University of Michigan, Institute for Social Research, Ann Arbor, M l . Research Network on Successful Aging. In this article we summarize the central findings of that work, pro- pose a conceptual framework for successful aging, and consider some pathways or mechanisms that make for successful old age. Defining Successful Aging We define successful aging as including three main components: low probability of disease and disease-related disability, high cognitive and physi- cal functional capacity, and active engagement with life. All three terms are relative and the relationship among them (as seen in Figure 1) is to some extent hierarchical. As the figure indicates, successful aging is more than absence of disease, important though that is, and more than the maintenance of functional capacities, important as it is. Both are im- portant components of successful aging, but it is their combination with active engagement with life that represents the concept of successful aging most fully. Each of the three components of successful aging includes subparts. Low probability of disease refers not only to absence or presence of disease itself, but also to absence, presence, or severity of risk factors for disease. High functional level includes both physical and cognitive components. Physical and cognitive capacities are potentials for activity; they tell us what a person can do, not what he or she does do. Successful aging goes beyond poten- tial; it involves activity. While active engagement with life takes many forms, we are most concerned with two — interpersonal relations and productive activity. Interpersonal relations involve contacts and transactions with others, exchange of information, Vol. 37, No. 4,1997 433 Downloaded from https://academic.oup.com/gerontologist/article-abstract/37/4/433/611033 by guest on 10 February 2018 AVOIDING DISEASE AND DISABILITY SUCCESSFUL AGING ENGAGEMENT WITH LIFE HIGH COGNITIVE AND PHYSICAL FUNCTION 100 Figure 1. A model of successful aging. emotional support, and direct assistance. An activity is productive if it creates societal value, whether or not it is reimbursed. Thus, a person who cares for a disabled family member or works as a volunteer in a local church or hospital is being productive, al- though unpaid (Herzog & Morgan, 1992). Staying Healthy: Reducing Risk Factors for Disease and Disability in Late Life The concept of usual aging as a large subset of those elderly previously considered to be normal is depicted in Figure 2 (Rowe, 1990). The curve farthest to the right, labeled Death, displays the 1980 age-specific mortality experience of the United States. The area to the left of the curve labeled Disability estimates that portion of the population without disability, and the envelope between the Death and Disability curves denotes the disabled population. The area to the left of the curve labeled Disease represents the nondiseased, nondisabled population. The final curve, labeled Risk, esti- mates the portion of the nondiseased population at significant risk for developing disease. The increas- ing dominance of this population with advancing age reflects emergence of the usual aging syn- drome associated with risk of chronic disease. The area at the extreme left and bottom of the figure in- cludes the nondiseased population at lowest risk, i.e., those who are aging successfully with respect to risk of emergence of disease. While the death, disability, and disease curves traditionally originate at 100\%, i.e., with none of the population affected at birth, the risk curve arbitrarily originates at 80\% not e UJ 50 UJ u DC UJ Q . Death Disability Disease 25 50 AGE (years) 75 100 Figure 2. Relation of risk of disease to presence of disease, disability, and death in an aging population. affected, to reflect the fact that many individuals begin at risk, either because of genetic factors or the psychosocial environment in which they are born. Heritability, Lifestyle, and Age-related Risk The previously held view that increased risk of diseases and disability with advancing age results from inevitable, intrinsic aging processes, for the most part genetically determined, is inconsistent with a rapidly developing body of information that many usual aging characteristics are due to lifestyle and other factors that may be age-related (i.e., they increase with age) but are not age-dependent (not caused by aging itself). A major source of such information is the Swed- ish Adoption/Twin Study of Aging (SATSA), a subset of the Swedish National Twin Registry that includes over 300 pairs of aging Swedish twins, mean age 66 years old, half of whom were reared together and half who were reared apart. About one third are monozygotic, while two thirds are dizygotic. Com- parison of usual aging characteristics in twins of dif- fering zygosity and rearing status enables estima- tion of the relative contributions of heritable and environmental influences. SATSA-based studies have determined the heri- tability coefficients (the proportion of total variance attributable to genetic factors) for major risk factors for cardiovascular and cerebrovascular disease in older persons. These are .66-.70 for body mass index, .28-.78 for individual lipids (total cholesterol, low- and high-density lipoprotein cholesterol, apolipoproteins A-1 and B, and triglycerides), .44 for systolic and .34 for diastolic blood pressure (Heller, deFaire, Pedersen, Dahlen, & McClearn, 1993; Hong, deFaire, Heller, McClearn, & Pedersen, 1994; Stunkard, Harris, Pedersen, & McClearn, 1990). Heritability trends across decades of advanced age revealed a reduction in the heritability coeffi- cients for apolipoprotein B and triglycerides (see Figure 3) and for systolic blood pressure (.62 for people under 65 years old and .12 for those over 65). 434 The Gerontologist Downloaded from https://academic.oup.com/gerontologist/article-abstract/37/4/433/611033 by guest on 10 February 2018 SERUM TRIGLYCERIDES 100 \% VARIANCE 100 50-62 54-66 58-72 62-76 AGE INTERVAL 6640 70-84 GENETK ENVIRONMENTAL Figure 3. Relative contributions of heredity and environment with advancing age to serum triglycerides in Swedish twins, adapted from Heller, D. et al., 1993. Consistent with these age-related reductions in her- itability are mortality data from a 26-year follow-up of the entire Swedish Twin Registry, 21,004 twins born between 1886 and 1925 (Marenberg, Risch, Berkman, Floderus, & deFaire, 1994). Among male identical twins, the risk of death from coronary heart disease (CHD) was eightfold greater for those whose twin died before age 55 than for those whose twin did not die before age 55, and among male nonidentical twins the corresponding risk was nearly four times greater. When one female identi- cal twin died before the age of 65, the risk of death for the other twin was 15 times greater than if ones twin did not die before the age of 65, and 2.6 times greater in the case of female nonidentical twins. Overall, the magnitude of the risk associated with ones twin dying of CHD decreased as the age at which the twin died increased, independent of gen- der and zygosity. Beyond twin studies, other evidence indicates the importance of lifestyle factors in the emergence of risk in old age. For instance, advancing age is associ- ated with progressive impairment in carbohydrate tolerance, insufficient to meet diagnostic criteria for diabetes mellitus but characterized by increases in basal and post-glucose challenge levels of blood sugar and insulin. The hyperglycemia of aging carries increased risk for coronary heart disease (Donahue, Abbott, Reed, & Yano, 1987) and stroke (Abbott, 1987), with progressive increases in the usual aging range associated with increasing risk. Similarly, the hyperinsulinemia associated with aging is an inde- pendent risk factor for coronary heart disease (Fty- orala, 1979; Foster, 1989). Several studies have now demonstrated that the dominant determinants of this risk are age-related but potentially avoidable factors, such as the amount and distribution of body fat (Elahi, Muller, Tzankoff, Andres, & Tobin, 1982; Kohrt, Staten, Kirwan, Wojta, & Holloszy, 1990) and reduced physical activity and dietary factors (Zavaroni et al., 1986). Substantial and growing evidence supports the contention that established risk factors for the 0.5 T 0.4 • • 0.3 • • ^ « 0.2 •• 0 . 1 • • Evans County blacks (RR = 1.08) * * * . . . Evans County whites {RR= 1.83) Tecumseh (RR = 3.87) N Gothenburg {RR = 4.00) Eastern Finland (RR = 2.63) Low High Level of Social Integration Note: RR Indicates the relative risk ratio of mortality at the lowest versus highest level of social integration Figure 4. Relation of level of social integration to age-adjusted mortality in five prospective studies, adapted from House, J. et al., 1988. emergence of diseases in older populations, such as cardiovascular and cerebrovascular disease, can be substantially modified (Hazzard & Bierman, 1990; Sticht & Hazzard, 1995). In a study demonstrating the modifiability of usual aging, Katzel and col- leagues (Katzel, Bleecker, Colman, Rogus, & Sorkin, 1995) conducted a randomized, controlled, pro- spective trial comparing the effects of a 9-month diet-induced weight loss (approximately 10\% of body weight) to the effects of a constant-weight aer- obic exercise program and a control program on a well characterized group of middle-aged and older men at risk for cardiovascular disease. The study participants were nondiabetic and were obese (body mass index 30 kg/m2), with increased waist- hip ratios and modest increases in blood pressure, blood glucose, insulin, and an atherogenic lipid profile. Compared to controls, the reduced-energy intake diet resulted in statistically significant reduc- tions in weight, waist-hip ratio, fasting and post- prandial glucose and insulin levels, blood pressure and plasma levels of triglycerides, low-density lipoprotein/cholesterol, and increases in high-den- sity lipoprotein/cholesterol. While the older weight loss subjects (over 60 years old) lost less weight than the middle-aged subjects and had more mod- est improvements in carbohydrate tolerance, they participated fully in the reductions in other risk fac- tors. In general, the weight loss intervention had greater effects than the constant-weight aerobic ex- ercise intervention. Taken together, these reports reveal three consis- tent findings. First, intrinsic factors alone, while highly significant, do not dominate the determina- tion of risk in advancing age. Extrinsic environmen- tal factors, including elements of lifestyle, play a very important role in determining risk for disease. Second, with advancing age the relative contribu- tion of genetic factors decreases and the force of Vol. 37, No. 4,1997 435 Downloaded from https://academic.oup.com/gerontologist/article-abstract/37/4/433/611033 by guest on 10 February 2018 nongenetic factors increases. Third, usual aging characteristics are modifiable. These findings un- derline the importance of environmental and be- havioral factors in determining the risk of disease late in life. Intra-lndividual Variability: A Newly Identified Risk Factor in Older Persons The traditional repertoire of risk factors identified in studies of young and middle-aged populations may not include some additional risk factors unique to, or more easily identified in, elderly populations. In this regard, the MacArthur Foundations Studies of Successful Aging point to a previously unrecog- nized risk factor — altered within-individual vari- ability in physiologic functions — which may be im- portant in determining the usual aging syndrome. Most gerontological research, and indeed re- search in all age groups, is not geared to the mea- surement of short-term variations and changes. Study designs generally focus on the absolute level of a variable, perhaps comparing levels at two or more time points that may be separated by months or years. Nesselroade and colleagues (Kim, Nessel- roade, & Featherman, 1996), reasoned that short- term variability in a number of physiological or per- haps psychological characteristics might reflect a loss of underlying physiological reserve and repre- sent a risk factor for emergence of disease or dis- ability. To study the impact of short-term variability, they examined between-person differences in simi- larly aged residents of a retirement community. They assessed various aspects of biomedical, cogni- tive, and physical functioning every week for 25 weeks in a group of 31 individuals and a matched group of 30 assessed only at the outset and the end of the 25-week period, and they followed the sub- jects for several years to ascertain the relationship between within-person variability and its risk. Within-person variability of a joint index of physi- cal performance and physiological measures (gait, balance, and blood pressure) was an excellent pre- dictor of mortality five years later (R = 0.70, R2 = 0.49). Variability of the composite measure was a better predictor of mortality than mean level, which did not represent a statistically significant risk factor (Nesselroade, Featherman, Agen, & Rowe, 1996). A similar pattern of findings held for the psychologi- cal attributes of perceived control and efficacy, for which average level was not a significant predictor of mortality but intra-individual variability scores predicted 30\% of the variance in mortality (Eizen- man, Nesselroade, Featherman, & Rowe, in press). It should be emphasized that some functions are highly variable under normal conditions and others much less so. The significant aspect of intra-individ- ual variability as a potential measure of decreased capacity and increased risk must be a change from the normal variability, regardless of whether the change is an increase or decrease. For example, a decline in beat-to-beat variability in heart rate has been shown to be a predictor of mortality in patients who have previously suffered a myocardial infarc- tion. While in the physiological measurement used in this study, an increase in variability was associated with increased risk; in other highly regulated sys- tems, a decrease in variability may be detrimental and represent decreased reserve and increased risk. Maximizing Cognitive and Physical Function in Late Life A second essential component of successful aging is maximization of functional status. One common concern of older people relates to cogni- tive function, especially learning and short-term memory. Another functional area of major interest is physical performance. Modest reductions in the capacity to easily perform common physical func- tions may prevent full participation in productive and recreational activities of daily life. The MacArthur Foundation Research Network on Successful Aging conducted a longitudinal study of older persons to identify those physical, psycholog- ical, social, and biomedical characteristics predic- tive of the maintenance of high function in late life. The 1,189 subjects in this three-site longitudinal study were 70-79 years old at initial evaluation and were functionally in the upper one third of the gen- eral aging population. Smaller age- and sex- matched samples (80 subjects in the medium func- tioning group and 82 subjects in the low functioning group) were selected to represent the middle and lowest tertiles. Initial data included detailed assess- ments of physical and cognitive performance, health status, and social and psychological charac- teristics (the MacArthur battery), as well as the col- lection of blood and urine samples. After a 2.0-2.5 year interval, 1,115 subjects were re-evaluated, pro- viding a 91\% follow-up rate for the study. Predictors of Cognitive Function Cognitive ability was assessed with neuropsycho- logical tests of language, nonverbal memory, verbal memory, conceptualization, and visual spatial abil- ity. In the initially high functioning group, four variables — education, strenuous activity in and around the home, peak pulmonary flow rate, and self-efficacy — were found to be direct predictors of change or maintenance of cognitive function, to- gether explaining 40\% of the variance in cognitive test performance. Education was the strongest pre- dictor, with greater years of schooling increasing the likelihood of maintaining high cognitive func- tion (Albert et al., 1995). This finding is consistent with several cross-sectional studies, which identify education as a major protective factor against re- ductions in cognitive function. Since all the subjects had high cognitive function at first evaluation, it is unlikely that the observed effect merely reflected ability to perform well on cognitive tests or was the result of individuals with greater innate intelligence having received more education. Instead, the re- sults suggest either or both of two explanatory mechanisms: a direct beneficial effect of education 436 The Gerontologist Downloaded from https://academic.oup.com/gerontologist/article-abstract/37/4/433/611033 by guest on 10 February 2018 early in life on brain circuitry and function, and the possibility that education is a proxy for life-long in- tellectual activities (reading, crossword puzzles, etc.) which might serve to maintain cognitive func- tion late in life. Pulmonary peak expiratory flow rate was the sec- ond strongest predictor of maintenance of cogni- tive function. In previous studies, this function was a predictor of total and cardiovascular mortality and a correlate of cognitive and physical function in el- derly populations (Cook et al., 1989). A surprising finding of this study was that the amount of strenuous physical activity at and around the home was an important predictor of maintain- ing cognitive function. In a follow-up study to eval- uate a possible mechanism of this effect, Neeper, Gomez-Pinilla, Choi, and Cotman (1995) measured the effect of exercise on central nervous system lev- els of brain-derived neurotrophic factor (BDNF) in adult rats. These investigators found that increasing exercise was associated with very substantial dose- related increases in BDNF in the hippocampus and neocortex, brain areas known to be highly respon- sive to environmental stimuli. These data provide a potential mechanism whereby exercise might en- hance central nervous system function, particularly memory function. A personality measure, perceived self-efficacy, was also predictive of maintaining cognitive function in old age. The concept of self-efficacy developed by Bandura is defined as peoples beliefs in their capa- bilities to organize and execute the courses of action required to deal with prospective situations (Ban- dura, 1995). In students and young adults, self-effi- cacy influences persistence in solving cognitive problems (Brown & Inouye, 1978), heart rate during performance of cognitive tasks (Bandura, Cioffi, Tay- lor, & Brouillard, 1988), mathematical performance (Collins, 1982), and mastery of computer software procedures (Cist, Schwoerer, & Rosen, 1989). Lach- man and colleagues have proposed a role for self-ef- ficacy beliefs in maintenance of cognitive function among older people (Lachman, & Leff, 1989; Lach- man, Weaver, Bandura, Elliott, & Lewkowicz, 1992). In addition to these findings of predictors of main- tenance of cognitive function, evidence is accumulat- ing to indicate that it can be enhanced in old age. For example, older people who showed a clear age- related pattern of decline in fluid intelligence (induc- tive reasoning and spatial orientation) showed sub- stantial improvement after five training sessions that stressed ways of approaching such problems and provided practice in solving them (Schaie & Willis, 1986). Moreover, repeated measurement indicated that the improvements were maintained. Studies from the Max Planck Institute in Berlin confirm the finding that cognitive losses among healthy older people are reversible by means of training, although they also show a substantial age-related training ef- fect in favor of younger subjects (Kliegl, Smith, & Baltes, 1989). There is a double message in these findings: first, and most important, the capacity for positive change, sometimes called plasticity, persists in old age; appropriate interventions can often bring older people back to (or above) some earlier level of function. Second, the same interventions may be still more effective with younger subjects, which sug- gests an age-related reduction in reserve functional capacity. These demonstrations of plasticity in old age are encouraging in their own right and tell us that positive change is possible. Predictors of Physical Function In the MacArthur studies, maintenance of high physical performance, including hand, trunk, and lower extremity movements and integrated move- ments of balance and gait, was predicted by both socio-demographic and health status characteristics. Being older and having an income of less than $10,000 a year increased the likelihood of a decline in physical performance, as did higher body mass index (greater fat), high blood pressure, and lower initial cognitive performance. Behavioral predictors of maintenance of physical function included mod- erate and/or strenuous leisure activity and emo- tional support from family and friends. Moderate levels of exercise activity (e.g., walking leisurely) ap- peared in these studies to convey similar advantages to more strenuous exercise (e.g., brisk walking). Continuing Engagement with Life The third component of successful aging, engage- ment with life, has two major elements: mainte- nance of interpersonal relations and of productive activities. Social Relations At least since Durkheims classic study of suicide (Durkheim, 1951), isolation and lack of connected- ness to others have been recognized as predictors of morbidity and mortality. Five prospective studies of substantial populations have now demonstrated causality throughout the life course in such associa- tions: being part of a social network is a significant determinant of longevity, especially for men (see Figure 4; House, Landis, & Umberson, 1988). Research on the health protective aspect of net- work membership has emphasized two kinds of supportive transactions: socio-emotional (expres- sions of affection, respect and the like) and instru- mental (direct assistance, such as giving physical help, doing chores, providing transportation, or giv- ing money (Cassel, 1976; Cobb, 1976; House, Kahn, McLeod, & Williams, 1985; Kahn, & Antonucci, 1981; Kahn & Byosiere, 1992). The three-community MacArthur study tested both instrumental and emotional support as predic- tors of neuroendocrine function and physical per- formance. Neuroendocrine measures were also studied as possible mediators of the effects of sup- port. Over a three-year period, marital status (being married), presumably a source of emotional sup- port, protected against reduction in productive ac- tivity (Glass, Seeman, Herzog, Kahn, & Berkman, 1995). Men with higher emotional support had sig- Vol. 37, No. 4,1997 437 Downloaded from https://academic.oup.com/gerontologist/article-abstract/37/4/433/611033 by guest on 10 February 2018 nificantly lower urine excretion of norepinephrine, epinephrine, and cortisol, and for both men and women, emotional support was a positive predictor of physical performance. Instrumental support, on the other hand, had few significant neuroendocrine relations for men, none for women, and was associ- ated with lower physical performance, probably as an effect rather than a cause (Seeman, Berkman, Blazer, & Rowe, 1994; Seeman, Berkman, Charpen- tier, Blazer, Albert, & Tinetti, 1995). These varying effects of social support are consis- tent with research relating the effect of support to the specific situation in which it is offered. For ex- ample, instrumental support rather than emotional support influenced the promptness with which older people who experienced cancer-suspicious symptoms actually saw a physician (Antonucci, Kahn, & Akiyama, 1989). Opposite results came from a nursing home experiment, however: socio-emo- tional support (verbal encouragement) had positive performance effects, whereas instrumental support (direct assistance) had negative effects on perfor- mance (Avorn & Langer, 1982). Several conclusions seem warranted regarding the properties of social relations and their effects: a. Isolation (lack of social ties), is a risk factor for health. b. Social support, both emotional and instrumen- tal, can have positive health-relevant effects. c. No single type of support is uniformly effective; effectiveness depends on the appropriateness of the supportive acts to the requirements of the situation and the person. Productive Activities Older people are not considered old by their families and friends, nor do they think of themselves as old, so long as they remain active and produc- tive in some meaningful sense (Kaufman, 1986). In legislative policy, Congressional discussion as to whether the nation can afford its older people is as much a debate about their productivity as their re- quirements for service, especially medical care. Part of the confusion stems from lack of clarity about what constitutes a productive activity. Our national statistics define Gross Domestic Product (GDP) in terms of activities that are paid for, and ex- clude all unpaid activities, however valuable. Sev- eral current studies (ACL, MacArthur, HRS) utilize a broader definition that includes all activities, paid or unpaid, that create goods or services of economic value (Kahn, 1986), and these studies have gener- ated age-related patterns very different from those for paid employment alone (Herzog, Antonucci, Jackson, Kahn, & Morgan, 1987; Herzog, Kahn, Mor- gan, Jackson, & Antonucci, 1989). The nationwide Americans Changing Lives (ACL) study found that, contrary to the stereotype of un- productive old age, most older people make pro- ductive contributions of some kind, more as infor- mal help-giving and unpaid volunteer work than paid employment. When all forms of productive ac- tivity are combined, the amount of work done by older men and women is substantial. Among those aged 60 or more, 39\% reported at least 1500 hours of productive activity during the preceding year; 41\% reported 500-1499 hours, and 18\% reported 1-499 hours. The relationship between age and pro- ductive activity depends on the activity. While hours of paid work drop sharply after age 55, hours of volunteer work in organizations peak in the mid- dle years (ages 35-55), and informal help to friends and relatives peaks still later (ages 55-64) and re- mains significant to age 75 and beyond. Both the ACL and MacArthur studies address the question of what …
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The team is currently using an I would start off with Linda on repeating her options for the child and going over what she is feeling with each option.  I would want to find out what she is afraid of.  I would avoid asking her any “why” questions because I want her to be in the here an Summarize the advantages and disadvantages of using an Internet site as means of collecting data for psychological research (Comp 2.1) 25.0\% Summarization of the advantages and disadvantages of using an Internet site as means of collecting data for psych Identify the type of research used in a chosen study Compose a 1 Optics effect relationship becomes more difficult—as the researcher cannot enact total control of another person even in an experimental environment. Social workers serve clients in highly complex real-world environments. 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After establishing where each member is in relation to the family A Health in All Policies approach Note: The requirements outlined below correspond to the grading criteria in the scoring guide. At a minimum Chen Read Connecting Communities and Complexity: A Case Study in Creating the Conditions for Transformational Change Read Reflections on Cultural Humility Read A Basic Guide to ABCD Community Organizing Use the bolded black section and sub-section titles below to organize your paper. For each section Losinski forwarded the article on a priority basis to Mary Scott Losinksi wanted details on use of the ED at CGH. He asked the administrative resident