异族效应影响工作记忆的比较过程:来自ERP的证据

Other Race Effect Influences Comparison Process in Working Memory: An ERP Study

以往有关异族效应的研究主要聚焦在其在知觉阶段的加工机制,尚未有研究探讨异族效应对工作记忆加工过程的影响。本研究采用延迟匹配范式,以反映比较过程中表征冲突的前额N2为指标,对异族效应影响工作记忆比较过程的机制进行了探讨。结果发现,异族效应调节人脸在工作记忆中的比较过程:本族人脸较异族人脸可诱发更负的前额N2。该研究为异族效应的发生机制提供了新的可能解释。

Previous studies predominately investigated the perceptual mechanisms underlying the other race effect, however, no study has explored whether the other race effect modulates the face processing in working memory （WM）. The current study addressed this is- sue by focusing on the comparison process of WM. In a delayed matching-to-sample paradigm, we presented two faces sequentially with 700 ms blank interval between. Anterior N2 was taken an index to reflect the comparison process in WM. We found that the anterior N2 was elicited when the two sequentially presented faces were different, regardless of their races. Critically, the own-race face evoked a significandy linger N2 than the other-race face, suggesting that the other race effect modulates the comparison process in WM.