Adolescents from nine intact health classes from two high schools participated either in a traditional lecturebased alcohol prevention intervention or a nontraditional experiential-based intervention. The nontraditional intervention focussed on attitudes toward drinking and the misperceptions associated with alcohol consumption norms. Subjects completed several self-report measures on attitudes toward drinking (own, perceived friends', and perceived school's), perceived ranking of alcohol consumption compared to closest friends and compared to the school, intent to drink, and actual reporting of alcohol consumption. For the nontraditional intervention, it was hypothesized that students would change their perceptions of others' attitudes toward drinking and their perception of the norm enough to decrease their alcohol consumption. Results indicated the intervention changed the perceived attitude of the school, but not enough to significantly change consumption levels. These findings confirm that misperceptions occur and that they influence alcohol consumption. / Department of Psychological Science