MPC use to problematic drinking . In this study , we examine the ability of various dimensions of risk and protection (i .e , social influences , cognitive-affective motivations , personal and social competence , and psychological functioning , and their changing status over time , to predict both MPC and transitions in MPC use . Data were obtained from a cohort of nonintervention control students participating in a prospective , school-based , drug prevention study . Prior to reporting the findings of this study , we provide a brief overview of community-based...











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