Drinking motives are robustly related to alcohol use behavior from adolescence through young adulthood. Yet, examination of changes in motives during the first year of college, a transitional time associated with both onset of and increases in heavy drinking has been understudied. We examined (a) whether drinking motives change, (b) time-varying effects of motives on alcohol use and consequences, and (c) change in the strength of the association between motives and use and motives and consequences over the first year of college. A sample of 121 heavy drinking first-year students (50% female, 58% Caucasian) completed three assessments (baseline, 3 months, 6 months). Endorsement of social motives declined from 0 to 3 months, while endorsement of coping, enhancement, and conformity motives declined from 3 to 6 months. Social motives were positively associated with alcohol use and consequences across assessments. When motive × time interactions were tested in separate models, the strength of effects of coping motives on drinks per week increased from 0 to 3 months. The strength of the effect of coping and conformity motives on consequences increased from 0 to 3 months and then decreased from 3 to 6 months. Identifying how drinking motives evolve and relate to trajectories of alcohol use may help to understand the development of risky drinking behavior and inform intervention efforts.

从青春期到青年期，饮酒动机与饮酒行为密切相关。然而，在研究大学一年级期间动机的变化时，与大量饮酒的开始和增加相关的过渡时间尚未得到充分研究。我们检查了 (a) 饮酒动机是否改变，(b) 动机对酒精使用和后果的时变影响，以及 (c) 在大学一年级期间动机和饮酒以及动机和后果之间的关联强度的变化. 121 名大量饮酒的一年级学生（50% 为女性，58% 为白种人）样本完成了三项评估（基线、3 个月、6 个月）。社会动机的认可从 0 个月减少到 3 个月，而应对、增强和从众动机的认可从 3 个月减少到 6 个月。社交动机与饮酒和评估结果呈正相关。当在单独的模型中测试动机 × 时间交互作用时，应对动机对每周饮酒的影响强度从 0 个月增加到 3 个月。应对和从众动机对后果的影响强度从 0 个月增加到 3 个月，然后从 3 个月减少到 6 个月。确定饮酒动机如何演变以及与饮酒轨迹的关系可能有助于了解危险饮酒行为的发展并为干预工作提供信息。应对和从众动机对后果的影响强度从 0 个月增加到 3 个月，然后从 3 个月减少到 6 个月。确定饮酒动机如何演变以及与饮酒轨迹的关系可能有助于了解危险饮酒行为的发展并为干预工作提供信息。应对和从众动机对后果的影响强度从 0 个月增加到 3 个月，然后从 3 个月减少到 6 个月。确定饮酒动机如何演变以及与饮酒轨迹的关系可能有助于了解危险饮酒行为的发展并为干预工作提供信息。