Abstract
Virtual copresence, or the sense of being with others in an online space, is a feeling induced on many apps and websites through user avatars and browsable profile pages. Despite the small/modest effect sizes observed in popular web-based personalized normative feedback (PNF) alcohol interventions for college students, previous research has yet to consider how copresence might boost efficacy. This study builds on previous PNF gamification work to investigate whether specific copresence features (visual and text-based information about peers) increase PNF's ability to reduce alcohol use relative to a standard PNF condition and a gamified PNF condition. Copresence and perceptions of drinking norms (average drinks, peak drinks, and binge episodes) were assessed during a 3-week period following random assignment of college students (N = 235) to 1 of the 4 web-based PNF conditions (Standard PNF, Gamified PNF Only, Gamified PNF + Visual Copresence, and Gamified PNF + Maximum Copresence). These conditions asked the same questions about drinking and delivered identical PNF on alcohol use, but differed in the level of visual and text-based information about peers. Overall, only the gamified condition that featured maximum copresence significantly reduced drinking outcomes relative to standard PNF. However, conditional effects were moderated by pre-intervention drinking. Among heavier pre-intervention drinkers, both gamified conditions that featured copresence significantly improved upon Standard PNF in reducing alcohol use at follow-up. Findings suggest that including social media-like copresence features to visually represent and provide basic information about the peers contributing to the norms can enhance the efficacy of gamified PNF interventions, especially among high-risk heavy drinkers.