White allies can advance racial justice on social media by amplifying Black activists and educating their White friends. Social media platforms like Twitter and Instagram have different affordances for message amplification, with some showcasing the message creator and others the message amplifier. How might these visibility differences influence the reception of a message created by a Black activist and amplified by a White ally? Two online experiments (N1 = 328, N2 = 328) of White participants found that affordances prioritizing the White message amplifier over the Black message creator led to reduced perceptions of messenger racism when the message was holding White people accountable for the maintenance of racism. However, participants in these conditions also had a harder time identifying that the message creator was indeed a Black activist. These results demonstrate the important nuances of social identity and allyship effects in the context of social media affordances.

中文翻译：

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转发正义？社交媒体信息放大和 Black Lives Matter 联盟

白人盟友可以通过扩大黑人活动家和教育他们的白人朋友来促进社交媒体上的种族正义。Twitter 和 Instagram 等社交媒体平台具有不同的消息放大功能，一些展示消息创建者，另一些展示消息放大器。这些可见性差异如何影响对由黑人活动家创建并由白人盟友放大的信息的接受？白人参与者的两个在线实验（N1 = 328，N2 = 328）发现，当信息让白人对维护种族主义负责时，优先考虑白人消息放大器而不是黑人消息创建者的启示导致对信使种族主义的看法减少。然而，处于这些条件下的参与者也很难确定消息创建者确实是一名黑人活动家。