How people describe both positive and negative events in their lives influences their perception of their own life.
When scientists began tracking the health of 268 Harvard sophomores in 1938 during the Great Depression, they hoped the longitudinal study would reveal clues to leading healthy and happy lives. They got more than they wanted.
After following the surviving Crimson men for nearly 80 years as part of the Harvard Study of Adult Development, one of the world's longest studies of adult life, researchers have collected a cornucopia of data on their physical and mental health.
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