"It collected data on habits, personalities, and behaviors in the longest-running longitudinal study ever conducted." is true regarding Lewis Terman's study.
The oldest and longest-running longitudinal study in psychology at the moment is the Genetic Studies of Genius, formerly known as the Terman Study of the Gifted. Lewis Terman of Stanford University started it in 1921 with the goal of examining the maturation and traits of exceptional children. The study's findings have been disseminated in numerous papers, five books, and a monograph. Although it wasn't a part of the longitudinal study, Catharine Cox published a related retrospective analysis of notable men throughout history as part of the Genetic Studies of Genius. It also served as inspiration for the on-going longitudinal Study of Mathematically Precocious Youth study.
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