Research indicates that people who engage in heavy episodic drinking (HED) report less intention to intervene and intervention behavior to prevent sexual violence. Researchers have also found gender differences across bystander intention, bystander confidence, and intervention behavior. However, research in this area could benefit from use of an evidence-based health behavior theory. The theory of planned behavior (TPB) posits that personal attitudes, subjective norms, and perceived behavioral control (PBC) predict behavioral intention. Substantial evidence supports the utility of the TPB for predicting behavioral intention in a variety of health-related behaviors, yet few researchers have applied this theory when predicting bystander intention to prevent sexual violence. Undergraduate students (N = 395) from a southern university (77% female; 70% White, Non-Hispanic) completed a modified Sexual Assault Bystander Behavior Questionnaire and the Daily Drinking Questionnaire. Our findings did not reveal significant differences in attitudes, subjective norms, PBC, nor intention based on HED; however, there were significant differences based on gender, with women indicating more positive attitudes and supportive subjective norms regarding bystander intervention. Multiple regression analysis indicated that theoretical antecedents of intention positively predicted bystander intention, however, the relations were not moderated by prior engagement in HED. These findings support the utility of the TPB for predicting bystander intention to intervene; however, they do not support previous research examining how HED influences bystanders’ intention to engage in prosocial actions.

研究表明，大量偶尔饮酒 (HED) 的人表示不太愿意干预和采取干预行为来防止性暴力。研究人员还发现旁观者意图、旁观者信心和干预行为存在性别差异。然而，这一领域的研究可以受益于基于证据的健康行为理论的使用。计划行为理论 (TPB) 假定个人态度、主观规范和感知行为控制 (PBC) 预测行为意图。大量证据支持 TPB 在预测各种与健康相关的行为中的行为意图的效用，但很少有研究人员在预测旁观者意图以防止性暴力时应用该理论。本科生（N= 395) 来自南方大学（77% 女性；70% 白人，非西班牙裔）完成了修改后的性侵犯旁观者行为问卷和每日饮酒问卷。我们的研究结果并未揭示态度、主观规范、PBC 或基于 HED 的意图方面的显着差异；然而，性别存在显着差异，女性对旁观者干预表现出更积极的态度和支持性的主观规范。多元回归分析表明，意向的理论前因对旁观者意向有积极的预测作用，然而，这种关系并没有因之前参与 HED 而得到缓和。这些发现支持 TPB 在预测旁观者干预意图方面的效用；然而，