Intimate partner violence (IPV) is a crime that is afflicted by a current or previous romantic relationship partner. One in four women has experienced IPV at least once in their lifetime, with physical and psychological consequences. IPV cases tend to go largely unnoticed and under-reported, with low rates of intervention by bystanders. This cross-sectional correlational study investigated whether a combination of attribution theory and the bystander effect could predict the willingness of strangers to intervene in IPV. There were two models tested. The first model examined attitudes towards the victim, while the second one examined attitudes towards the perpetrator. The relationship between perceived responsibility and willingness to intervene was hypothesized to be mediated by sympathy and anger, with the number of bystanders as a moderator to mediating pathways (sympathy towards victim and anger towards perpetrator). A convenience sample of 278 Australian residents aged 18-years and older was presented in a vignette depicting an IPV incident occurring in public. Participants completed measures about the vignette in an online questionnaire. Model testing was conducted using MPlus; confirmatory factor analysis indicated a good fit of the measurement models. After controlling potential covariates, moderated mediation models of victim and perpetrator were analyzed. Attribution theory was a significant predictor in willingness to intervene (f² = .23, p < .001), but the bystander effect was not. Both attitudes towards victim and perpetrator accounted for unique variance in willingness to intervene in IPV, highlighting the importance of examining both. Findings indicate that psychoeducation campaigns aimed at reducing victim-blaming and promoting intervening behavior could be an effective means of preventing IPV.

亲密伴侣暴力 (IPV) 是一种受到当前或以前的浪漫关系伴侣折磨的犯罪。四分之一的女性在其一生中至少经历过一次 IPV，对身体和心理造成了影响。IPV 案件往往在很大程度上被忽视和报道不足，旁观者的干预率很低。这项横断面相关性研究调查了归因理论和旁观者效应的结合是否可以预测陌生人干预 IPV 的意愿。测试了两个模型。第一个模型检查对受害者的态度，而第二个模型检查对犯罪者的态度。感知责任和干预意愿之间的关系被假设为由同情和愤怒调节，旁观者的数量作为调解途径的调节者（对受害者的同情和对肇事者的愤怒）。一个包含 278 名 18 岁及以上的澳大利亚居民的便利样本出现在一个小插曲中，该小插曲描述了在公共场所发生的 IPV 事件。参与者在在线问卷中完成了有关小插曲的测量。使用 MPlus 进行模型测试；验证性因素分析表明测量模型拟合良好。在控制潜在协变量后，分析了受害者和施暴者的调节中介模型。归因理论是干预意愿的重要预测指标（一个包含 278 名 18 岁及以上澳大利亚居民的便利样本展示在一个小插曲中，该小插曲描述了在公共场所发生的 IPV 事件。参与者在在线问卷中完成了有关小插曲的测量。使用 MPlus 进行模型测试；验证性因素分析表明测量模型拟合良好。在控制潜在协变量后，分析了受害者和施暴者的调节中介模型。归因理论是干预意愿的重要预测指标（一个包含 278 名 18 岁及以上澳大利亚居民的便利样本展示在一个小插曲中，该小插曲描述了在公共场所发生的 IPV 事件。参与者在在线问卷中完成了有关小插曲的测量。使用 MPlus 进行模型测试；验证性因素分析表明测量模型拟合良好。在控制潜在协变量后，分析了受害者和施暴者的调节中介模型。归因理论是干预意愿的重要预测指标（f ² = .23, p < .001)，但旁观者效应不是。对受害者和施暴者的态度都解释了干预 IPV 意愿的独特差异，突出了检查两者的重要性。调查结果表明，旨在减少对受害者的指责和促进干预行为的心理教育活动可能是预防 IPV 的有效手段。