A systematic review was conducted on the role of substance use initiation in subsequent use and substance-related problems among adolescents. Specifically, we examine previous studies to identify whether age of onset predicts subsequent levels of misuse; we also posit reasons for this association that have been suggested within the literature. In…

Two theoretical perspectives have been proposed to describe, explain, and intervene in adolescent development--prevention science and positive youth development (PYD). An integrative model bridging these two perspectives posits that it is important to assess the extent to which the same, similar, or complementary mechanisms may be responsible for…

The purpose of this study was to describe and evaluate a promising program model, the Joven Nobel curriculum, for Latino male adolescents that promotes positive youth development and addresses prevention of a number of risk-related sexual behaviors within a cultural context. A quasi-experimental design was used that included a pre- and posttest…