This study examined incoming first-year students' normative perceptions of alcohol use and alcohol-related attitudes of other students of the same gender living on their residence hall floor. Male and female residents overestimated the alcohol use behavior and related attitudes among their floormates. Results also showed that perceived norms were strongly related to individual drinking behaviors and permissive attitudes toward drinking. Moreover, feelings of connectedness to one's residence hall were found to moderate this relationship. These findings identify a salient reference group to target initiatives aimed at utilizing normative feedback to reduce alcohol-related risk in the first year of college. (Contains 2 figures and 1 table.)