Health-specific optimism mediates between objective and perceived physical functioning in older adults
Particularly in older adults, self-reports of physical health need not necessarily reflect their objective health status as they can be biased by optimism. In this study, we examine whether the effect of objective physical functioning on subjective physical functioning is modified by health-specific optimism and self-efficacy. A longitudinal study with three measurement points over 6 months and 309 older adults (aged 65–85) with multimorbidity was conducted. Subjective physical functioning was regressed on objective physical functioning, health-specific optimism and self-efficacy. Subjective physical functioning was predicted by both objective physical functioning and optimism as a mediator. Moreover, an interaction between optimism and self-efficacy was found: Optimism predicted subjective physical functioning only for individuals with low self-efficacy. Subjective physical functioning is as much based on objective physical functioning as it is on health-specific optimism. Older adults base their subjective physical functioning on objective indicators but also on optimism, when they are less self-efficacious.
KeywordsOptimism Self-efficacy Physical functioning Older adults Multimorbidity
- Aiken, L. S., & West, S. G. (1991). Multiple regression: Testing and interpreting interactions. Newbury Park, CA: Sage.Google Scholar
- Bandura, A. (1997). Self-efficacy: The exercise of control. New York: Freeman.Google Scholar
- Bonetti, D., Johnston, M., Rodriguez-Marin, J., Pastor, M., Martin-Aragon, M., Doherty, E., et al. (2001). Dimensions of perceived control: A factor analysis of three measures and an examination of their relation to activity level and mood in a student and cross-cultural patient sample. Psychology and Health, 16, 655–674.CrossRefGoogle Scholar
- Brummett, B. H., Helms, M. J., Dahlstrom, W. G., & Siegler, I. C. (2006). Prediction of all-cause mortality by the Minnesota Multiphasic Personality Inventory Optimism-Pessimism Scale scores: study of a college sample during a 40-year follow-up period. Mayo Clinic Proceedings, 81, 1541–1544.PubMedCrossRefGoogle Scholar
- Bullinger, M., & Kirchberger, I. (1998). SF-36 Fragebogen zum Gesundheitszustand [The SF-36 Health Survey Questionnaire]. Göttingen: Hogrefe.Google Scholar
- Fortin, M., Lapointe, L., Hudon, C., Vanasse, A., Ntetu, A. L., & Maltais, D. (2004). Multimorbidity and quality of life in primary care: A systematic review. Health and Quality of Life Outcomes, 2. doi:10.1186/1477-7525-1182-1151
- Guralnik, J. M., Simonsick, E. M., Ferrucci, L., & Glynn, R. J. (1994). A short physical performance battery assessing lower extremity function: Association with self-reported disability and prediction of mortality and nursing home admission. Journal of Gerontology: Medical Sciences, 49, M85–M89.Google Scholar
- Renner, B., & Schupp, H. T. (2011). The perception of health risks. In H. Friedman (Ed.). Oxford Handbook of Health Psychology. New York, NY: Oxford University Press. http://ukcatalogue.oup.com/product/9780195342819.do.
- Schenkman, M., Hughes, M. A., Samsa, G., & Studenski, S. (1996). The relative importance of strength and balance in chair rise by functionally impaired older individuals. Journal of the American Geriatric Society, 44, 1441–1446.Google Scholar
- Schüz, B., Wurm, S., Warner, L. M., & Ziegelmann, J. P. (in press). Self-efficacy and multiple illness representations in older adults: A multilevel approach. Psychology and Health.Google Scholar
- Schwarzer, R., & Jerusalem, M. (1995). Generalized self-efficacy scale. In J. Weinman, S. Wright, & M. Johnston (Eds.), Measures in health psychology: A user’s portfolio. Causal and control beliefs (pp. 35–37). Windsor, England: NFER-Nelson.Google Scholar
- Unesco. (1997). ISCED 1997: International standard classification of education retrieved May 16th 2010, from http://www.uis.unesco.org/publications/ISCED97