Age, social learning, and social bonding in adolescent substance use

We propose that social learning and social bonding theories are capable of accounting for the well-known relationship of crime and delinquency to age. Models incorporating age and variables derived from these two theories are tested with data on adolescent substance use among a large sample of Midwest adolescents in Grades 7 through 12. Older adolescents consume more marijuana than younger adolescents, and the age-use curve is matched by the relationship between age and social learning variables. Differences in use by age are also correlated with differences in strength of social bonds by age, but to a lesser extent. The findings support the hypothesis that age variations in marijuana use are mediated by age-related variations in social learning; there is also support, although somewhat weaker, for the similar hypothesis that social bonding variables mediate the age-marijuana use relationship during adolescence.