现实群际威胁对注意转换功能的影响——来自行为和ERP的证据

On Effect of Realistic Intergroup Threat on Shifting Function:Behavioral and ERP Evidence

为探讨现实群际威胁对注意转换功能的影响及其神经机制,使用经典注意转换任务范式,通过操作现实群际威胁,考察现实威胁对注意转换代价上的影响.实验1验证了前人的发现:现实群际威胁会损耗注意转换功能,较之控制组,现实威胁组被试在行为层面表现出更大的注意转换代价.实验2则通过事件相关电位技术(ERP,event-related potential)考察现实群际威胁影响注意转换功能的时间进程,发现现实群际威胁对注意转换功能的影响主要发生在N270成分和LPP成分上.

In the present study,we aim to examine whether shifting function could be modulated by realistic intergroup threat and how it works if it is true.We conducted two experiments designed to test the shifting cost to which targets of one type of intergroup threat（realistic group threat）attempt to deplete the executive resources needed to do well on switching tasks.Across 2 experiments with a task-switching paradigm,they provide converging evidence that realistic intergroup threat could impaired shifting function.In another words,participants in the threat condition always experienced greater shifting cost than the participants in the control condition in both behavioral and ERP studies.