Marijuana Use Grid: A Brief, Comprehensive Measure of Marijuana Use

The present study introduces a brief, yet comprehensive retrospective self-report measure of frequency and quantity of marijuana use: the Marijuana Use Grid (MUG). Using two large samples of college student marijuana users recruited from several universities throughout the United States, we characterized how various indicators of marijuana use frequency and quantity relate to consequences and symptoms of cannabis use disorder (CUD), and whether marijuana use frequency and quantity as assessed by the MUG predict outcomes above and beyond the effect(s) of a simple measure of marijuana use frequency. Typical frequency and quantity estimates from the MUG interacted to predict marijuana-related outcomes. The MUG has shown utility in its association with important outcomes and given its brief nature, the MUG can easily be integrated in future marijuana studies. Additional work is needed to examine the predictive utility of the MUG in the context of other marijuana-related assessments.