Ingroup bias with multiple identity dimensions
通过在线实验研究多重身份维度意识对内群体偏袒的影响，发现拓宽身份意识并未减少偏袒，反而在某些情况下增加了偏袒。
Abstract Group identity is known to exert a powerful socio‐psychological influence on behaviour, but has largely been explored as a uni‐dimensional phenomenon. Theoretically, an increase in the number of identity dimensions considered should make it harder to draw clear boundaries between people. Therefore, we ask whether broadening awareness of identity to multiple dimensions could help alleviate ingroup biases. We explore this in an online experiment, focusing on two different political dimensions of identity. In the control arm, we induced (narrow) awareness of a single identity dimension; in the treatment arm, we induced (broad) awareness of both dimensions. Subsequently, we used a third‐party allocation task to measure ingroup bias on each dimension. Crucially, revealed identity information was held constant across arms during the decision. We found that broader awareness did not decrease ingroup bias and in one setting increased it. We provide supplementary analysis to examine possible mechanisms for our counter‐intuitive findings.