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This present study investigated the genetic and environmental influences on the associations between adolescents' peer characteristics (i.e., peer college orientation, and peer delinquency) and smoking in young adulthood. We used longitudinal data from the Nonshared Environment and Adolescent Development (NEAD) project. Parents' reports on adolescents' peer characteristics and adolescents' self-reports...
Research has shown that substance use might serve beneficial, developmental functions for adolescents, in particular concerning young people's functioning in friendships and intimate relationships. Nonetheless, a major problem in these studies is that information on social functioning is based on adolescent's self-reports, which undoubtedly might lead to an overestimation of the social functions of...
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