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Objective: Marijuana is the most frequently reported illicit substance used on college campuses. Despite the prevalence, few published intervention studies have focused specifically on addressing high-risk marijuana use on college campuses. The present study evaluated the efficacy of an in-person brief motivational enhancement intervention for reducing marijuana use and related consequences among frequently using college students. Method: Participants included 212 college students from 2 campuses who reported frequent marijuana use (i.e., using marijuana at least 5 times in the past month). Participants completed Web-based screening and baseline assessments and upon completion of the baseline survey were randomized to either an in-person brief intervention or an assessment control group. Follow-up assessments were completed approximately 3 and 6 months post-baseline. Marijuana use was measured by number of days used in the past 30 days, typical number of joints used in a typical week in the last 60 days, and marijuana-related consequences. Results: Results indicated significant intervention effects on number of joints smoked in a typical week and a trend toward fewer marijuana-related consequences compared with the control group at 3-month follow-up. Conclusion: This study provides preliminary data on short-term effects of a focused marijuana intervention for college students at reducing marijuana use during the academic quarter. [ABSTRACT FROM AUTHOR]

The article presents a study which evaluates the brief web-based intervention for college students who use marijuana. First-year college students completed 3-month and 6-month follow-up assessments. Results showed that the interventions proved no overall effect but moderator analysis indicated promising effects to those with family history of marijuana.

The article discusses the perceived norms and social expectancies on entering college students who are marijuana users. This study observed the relationships among these predictors among freshmen marijuana users where student participants observed completed online assessments on their activities. They gave out data on their use of marijuana, related consequences, perceived norms, and social expectancies. Results were gathered and analyzed on perceived descriptive norms and injunctive norms among students.