RESUMEN
To assess the utility of the MacAndrew Scale (MAC) of the MMPI as a screening device for problem drinking and drug use with adolescents, 403 ninth- through twelfth-graders were administered the MAC, a sociodemographic questionnaire, an alcohol/drug frequency questionnaire, the Adolescent Alcohol Involvement Scale, and the Adolescent Drug Involvement Scale. Stepwise multiple regression analyses showed the MAC to be the best single predictor (compared to sociodemographic variables) of alcohol/drug use for both males and females. MAC cutoff scores for differentiation between alcohol/drug abusers and nonabusers were obtained that were more efficient than base rate prediction. The results are discussed as supportive of the MAC's concurrent validity and of Jessor and Jessor's "problem behavior theory." Finally, implications for practice (e.g., early intervention and prevention) and future research are considered.