Relations between cannabis use and dependence, motives for cannabis use and anxious, depressive and borderline symptomatology.

This study investigated the relations between anxious, depressive and borderline symptomatology, motivations for cannabis use, and cannabis use and dependence among 212 adolescents and young adults, 114 of whom were cannabis users. Motives for cannabis use were assessed using the Marijuana Motives Measure (Simons, J., Correia, C. J., Carey, K. B., & Borsari, B. E. (1998). Validating a Five-Factor Motives Measure: Relations with use, problems and alcohol motives. Journal of Counseling Psychology, 45, 265-273.). In three sets of regression analyses, motives, cannabis use frequency, and cannabis dependence served as criterion variables. First, when motives were regressed on psychopathological measures, borderline symptomatology predicted expansion motives in both boys and girls. Second, when frequency of use was regressed on motives and psychopathological measures, enhancement motives were the only significant predictor among boys and expansion motives were the only significant predictor among girls. Finally, when cannabis dependence was regressed on motives and psychopathological measures, borderline symptomatology was the only significant predictor in boys and expansion motives were the only significant predictor in girls. This study suggests the importance of motives and borderline symptomatology in the understanding of cannabis use and dependence among adolescents and young adults.