Examined the role of difficult temperament or behavioral style and tobacco, alcohol, and marijuana use in the 133 subjects of the New York Longitudinal Study. Results indicated that the possession of difficult temperamental characteristics at age five and in early adulthood are associated with drug use in young adulthood. (JAC)

As the adolescent matures, drinking situations occur outside of the home with friends. This period is characterized by drinking habits, patterns, and attitudes which are different from those of the parent population; the peer group and situational factors are significant influences on drinking behavior during this phase. (Author)