Nonshared Environment in Adolescent Development (NEAD)

The Nonshared Environment in Adolescent Development (NEAD) project is a longitudinal study of adolescents and parents. The original aim of NEAD was to identify the nonshared environmental influences, particularly those within families that resulted in such large differences in adolescent development in siblings. This original focus was to address the question of why children reared in the same family are so different from one another. NEAD chose to focus on differences within the family by carefully measuring family relationships — between parents and children, siblings and within the couple — in an effort to better understand sources of within-family differences. NEAD was one of the first studies to take advantage of the high rates of divorce and remarriage in the United States by recruiting a sizable sample of siblings of varying degrees of genetic relatedness from stepfamilies as well as including twins and siblings from nondivorced households.The Young Adult Sibling Study (YASS) is a young adult extension of NEAD that examines relationships among the same NEAD participants and adds assessments of other relevant relationships when the siblings were young adults.

Data are still Available

Study Investigators:

Jenae Neiderhiser
David Reiss - Yale University