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Sound Body, Sound Mind? The Interrelation between Health Change and Personality Change in Old Age

Personality development is characterized by increasing maturation, that is, people become more conscientious, agreeable and emotionally stable as they age. In late life, however, these trends seem to be reversed. Because many changes and transitions in older age are related to health, we investigated correlated changes in health problems and personality traits, the sources of health changes in later life and the directionality of effects. Our sample consisted of older adult twins, aged 64–85 years at time 1 (n = 410; 135 male/275 female; 134 monozygotic/63 dizygotic twin pairs), assessed at two different time points about five years apart, and we ran bivariate latent change and latent change twin model analyses. Increasing health problems were associated with decreases in agreeableness, extraversion, emotional stability and conscientiousness. Changes in health problems were only due to environmental influences, implying that the association between health and personality changes was exclusively environmental. Directional effects were largely absent, but health and personality were significantly related at the second measurement occasion (age 69–89 years). Our results support the link between health change and personality change in late life and spark the assumption of normative personality adaptations to deterioration of health status as a means of developmental regulation. Copyright © 2017 European Association of Personality Psychology