Leveraging dynamic norms to reduce alcohol use among college students: A proof-of-concept experimental study

Background Norm-correcting interventions are an effective alcohol harm-reduction approach, but innovation is needed to increase modest effect sizes. Recent social psychology research shows that individuals may be influenced by social norms that are increasing in prevalence. Contrary to static norms that reflect the current state of normative behavior, dynamic norms reflect behavioral norms that are shifting over time. This proof-of-concept study tested the utility of dynamic norms messages within norm-correcting interventions. Method Undergraduate student drinkers (N = 461; M-age = 19.97; 64.43% female) were randomly assigned to receive (a) dynamic norms messages highlighting a steady decrease over the past six years in heavy drinking among college students; (b) static norms messaging stating only the current norms; or (c) a control condition without normative information. Proximal outcomes assessed immediately following the experimental paradigm included intentions for total weekly drinks and heavy episodic drinking. Self-reported information on alcohol use behavior was collected at 1-month follow-up. Results Following the experimental paradigm, participants in the dynamic norms condition estimated that future drinking norms would decrease, while those in the static norms and control groups estimated that future drinking norms would increase. Participants in the dynamic norms condition reported lower intentions for weekly drinks and heavy episodic drinking than those in the static norms and control conditions. No significant differences between conditions were found on alcohol use indices reported at the 1-month follow-up. However, dynamic norms messaging had a favorable indirect effect on heavy episodic drinking intentions mediated through lower perceived future drinking norms. Conclusions These findings provide proof-of-concept that dynamic norms messaging may be a prudent strategy for reducing alcohol use intentions, which can be integrated into or used alongside existing norm-correcting strategies.