Adult Twin Study of Personality and Behavioral Adjustment
The MSUTR Adult Twin Study of Personality and Behavioral Adjustment is a study of 168 same-sex male, 294 same-sex female, and 270 opposite-sex twins between the ages of 18 and 30 years old. The primary purpose of this study was to examine the extent to which genetic and environmental influences on eating pathology, ADHD, depressive symptoms, anxiety, personality characteristics, and substance use differ between men and women in young adulthood.
Read more about this topic: Michigan State University Twin Registry
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—“Jennie June” Croly 1829–1901, U.S. founder of the woman’s club movement, journalist, author, editor. Demorest’s Illustrated Monthly and Mirror of Fashions, p. 204 (August 1866)