This article provides an overview of the role conscientiousness plays in the health process over the life course. The authors describe their research on the underlying structure of conscientiousness and how conscientiousness predicts social environmental factors and health behaviors that have a known relationship to health and longevity. The authors then show that conscientiousness continues to develop in young adulthood, midlife, and even potentially in old age. Finally, they show that the life paths and health behaviors that are associated with health are also associated with changes in conscientiousness across the life course.
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