Bad Mood Doesn't Drive Cannabis Use — Challenging a Core Addiction Theory

Neither positive nor negative affect consistently predicted cannabis use likelihood or quantity across hundreds of statistical model specifications. For alcohol, higher negative affect actually predicted decreased drinking (median OR=0.95, p<.001). High-arousal positive states like joviality predicted increased drinking. These patterns held regardless of substance use disorder severity or social context.

Ecological momentary assessment study of 496 young adults (ages 18-22, diverse recruitment from college and community). Specification curve analyses tested affect-substance use associations across hundreds of models varying affect operationalization, time scales, and moderators.

A core assumption of addiction theory is that people use substances to cope with negative emotions. This large, methodologically rigorous study finds the opposite for alcohol and no relationship for cannabis — suggesting we may need to fundamentally rethink how we understand substance use motivation.

This directly challenges the widely-held belief that people drink or use cannabis to cope with negative emotions. Instead, drinking appears more driven by positive social excitement, and cannabis use seems disconnected from mood states entirely — at least in young adults.

Young adult sample (18-22) may not generalize to older adults or clinical populations. EMA assessments 5x/day may not capture all mood-substance interactions. Self-reported mood and use. Community/college sample, not clinical addiction population.