Patterns and Importance of Self-Other Differences in College Drinking Norms.

Abstract: 

College students overestimate other students' drinking behavior (descriptive norms) and attitudes (injunctive norms). This study explored the effects of demographics, norm type, and reference group on the magnitude of self- other differences (SODs). Participants (N = 1,611; 64% women) completed surveys assessing demographics, drinking patterns, and perceived norms. A subset of 122 students provided consumption data 1 month later to test predictors of changes in drinking. Overall, women and non-Greeks (Greek = member of fraternity or sorority) reported larger SODs for both norm types compared with men and Greeks. Heavier drinkers reported smaller SODs. Gender × Reference Group interactions revealed that women had larger SODs for reference groups increasingly distal to them; for men, the largest SODs occur for close friends versus more distal groups. Larger SODs for descriptive norms predicted increases in drinking, consistent with social norms theory.