This study builds on the work of others who have examined the impact of marijuana use on psychosocial functioning by incorporating several desirable features gleaned from previous research '-5: (1) the longitudinal design necessary for time ordering of variables and more confident predictions; (2) a 5-year interval enabling examination of longterm rather than short-term and more transitory associations; (3) a time interval within important developmental periods, early and late adolescence; (4) a focus on marijuana's associations with problem behaviors and attitudes, drug problems, and sibling and peer behavior; (5) a difficult-to-access inner-city African American and Puerto Rican sample; and (6) controls on early problems in examinations of the relationship of early marijuana use with later problems.In the review to follow we focus on studies in which marijuana use is the only independent variable.

Among African Americans and Puerto Ricans, early marijuana use predicts less adequate performance on some developmental tasks integral to becoming an independent young adult. Marijuana is not a benign drug and is associated with future risks for the individual and society at large.

This study assesses the relationship of multiple drug risks, Puerto Rican identity, and drug use. In addition, the risk/protective and protective/protective paradigms for examining interactive effects of ethnic identity and drug risks on drug use were assessed. Structured interviews were conducted with 555 Puerto Rican males andfemales whose mean age was 19. Each risk and two ethnic variables were related to drug use. Regressions showed that cultural knowledge, being culturally active, group attachment, and identification with Puerto Ricans offset the impact of risks on drug use. Ethnic variables also enhanced the protective effect of other protective factors. These results substantiate expanding risk-buffering models to include ethnic identity and the protective role of ethnic identity for Puerto Rican youth.

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This study examined the multiple components of ethnic identity, the place of this ethnic identity set in the mediational model of the path to drug use predicted by our family interactional framework, and the protective role of each component of ethnic identity. The participants were 259 male and 368 female African Americans in late adolescence. They responded to a structured questionnaire in individual interviews. We found that few of the specific components of ethnic identity were significantly related as main effects to drug use. Most of the effect of ethnic identity was mediated by the family set of variables. Each of the components of ethnic identity offset risks or enhanced protective factors from the ecology, family, personality, and peer domains, thereby lessening drug use. This pattern highlights the importance of incorporating ethnic identity into drug prevention programs which serve African-American youth.

We tested the hypothesis that there is a mediational pathway from parental alcohol use during the participants' adolescence to the participants' psychological symptoms in young adulthood. This pathway includes the participants' alcohol use and their psychological symptoms, both during adolescence. The participants are inner city African American and Puerto Rican early adolescents followed until young adulthood. They reported their own and their parents' behavior. Structural equation modeling showed that parental alcohol use was related to early adolescent alcohol use, which was associated with late adolescent alcohol use. Late adolescent alcohol use was related to psychological symptoms in late adolescence, which predicted young adult psychological symptoms. Males reported more alcohol use and more psychological symptoms than females in late adolescence and more psychological symptoms in young adulthood. Findings suggest that parents' and adolescents' alcohol use should be a focus in interventions designed to prevent or treat psychological symptoms in late adolescence and young adulthood. KeywordsParent and adolescent alcohol use; adolescent and young adult psychological symptoms

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