Genetic and Environmental Overlap Between Substance Use and Delinquency in Adolescence: An Analysis by Same-Sex Twins

During adolescence, many teens begin to experiment with substances and engage in delinquent behavior. The current study seeks to examine whether and to what extent genetic and environmental factors contribute to the association between substance use (i.e., marijuana and alcohol) and different forms of delinquent offending (i.e., violent and nonviolent) across males and females. Analyses were based on same-sex twins ( N = 1,072) from the sibling...