Perceived drinking motives of social network members appear to influence emerging adults’ alcohol use indirectly through their own drinking motives. Ascertaining the accuracy of motive perceptions can determine the relevance of social norm interventions for drinking motives and the utility of egocentric versus direct-reporting social network designs. As part of a larger study, 60 emerging adults (70% female; mean age = 21.57) reported cross-sectionally on their own drinking motives and the drinking motives of a peer. Peers were recruited and reported on their drinking motives. Regression analyses utilizing the truth and bias model indicated social, coping-with-anxiety, and coping-with-depression motives exhibited accuracy. Participants also overestimated peers’ social, enhancement, and conformity motives. Coping-with-depression and enhancement motives exhibited assumed similarity. Most motive perceptions were heavily or singularly influenced by bias. Whether to include actual and/or perceived motives in social network research designs should be carefully considered.

社交网络成员感知到的饮酒动机似乎通过他们自己的饮酒动机间接影响了新兴成年人的酒精使用。确定动机感知的准确性可以确定社会规范干预与饮酒动机的相关性以及以自我为中心与直接报告的社交网络设计的效用。作为一项大型研究的一部分，60 名新兴成年人（70% 为女性；平均年龄 = 21.57）横向报告了他们自己的饮酒动机和同伴的饮酒动机。招募了同行并报告了他们的饮酒动机。利用真值和偏见模型的回归分析表明，社会、应对焦虑和应对抑郁的动机表现出准确性。参与者还高估了同伴的社交、提升和从众动机。应对抑郁和增强动机表现出假定的相似性。大多数动机感知都受到偏见的严重或特殊影响。应仔细考虑是否在社交网络研究设计中包含实际和/或感知的动机。