Social justice movements often consist of both targets of bias (e.g., Black people) and nontarget allies (e.g., White people). However, little is known about what factors shape minorities’ perceptions of allies and their ally behaviors. Across four studies, we investigated Black participants’ perceptions of Whites’ motives to engage in ally behaviors. In Study 1, we found that Black participants perceived nontarget allies as both highly internally and externally motivated, suggesting ally motives may be ambiguous to Black perceivers. Studies 2–4 examined the effect of Black participants’ suspicion of Whites’ motives on perceptions of White allies’ sincerity and support for their ally efforts. As predicted, suspicious Black participants perceived White ally protestors, confronters, and political candidates as less sincere than similar Black targets and, in turn, were less supportive of White allies’ efforts. Discussion focuses on how perceived motives of White allies impact perceptions of allies and their ally efforts.

社会正义运动通常由偏见的目标（例如黑人）和非目标盟友（例如白人）组成。然而，关于是什么因素影响了少数族裔对盟友的看法及其盟友行为，我们知之甚少。在四项研究中，我们调查了黑人参与者对白人参与盟友行为动机的看法。在研究 1 中，我们发现黑人参与者认为非目标盟友具有高度的内部和外部动机，这表明盟友的动机对于黑人感知者来说可能是模棱两可的。研究 2-4 考察了黑人参与者对白人动机的怀疑对白人盟友的诚意和对其盟友努力的支持的看法的影响。正如预测的那样，可疑的黑人参与者认为白人盟友抗议者、对抗者、和政治候选人的诚意不如类似的黑人目标，反过来，也不太支持白人盟友的努力。讨论的重点是白人盟友的感知动机如何影响对盟友的看法及其盟友的努力。