Doi Hirokazu, Ueda Kazuhiro, Shinohara Kazuyuki
Department of Neurobiology and Behavior, Graduate School of Biomedical Sciences, Nagasaki University, 1-12-4 Sakamoto-cho, Nagasaki City, Nagasaki Prefecture 852-8523, Japan.
Neuropsychologia. 2009 Mar;47(4):1053-60. doi: 10.1016/j.neuropsychologia.2008.11.004. Epub 2008 Nov 13.
The present study investigated the neural mechanism underlying the stare-in-the-crowd effect by measuring event-related-potentials. The results showed that neural activity was modulated by the type of the target face, either a face with a straight gaze or one with an averted gaze, at several dissociable stages of neural processing. Specifically, the target type modulated both early sensory components and late components that are presumably linked to emotional responses. Moreover, N2pc, a reliable indicator of attention deployment, was recorded in subjects searching for the straight target, but was drastically diminished in subjects searching for the averted target. In sum, the efficiency of the search for the straight gaze derives from both attention capture by and efficient processing of the straight gaze.
本研究通过测量事件相关电位来探究“人群中的凝视”效应背后的神经机制。结果表明，在神经处理的几个可分离阶段，神经活动受到目标面孔类型的调节，目标面孔类型包括直视面孔或回避凝视面孔。具体而言，目标类型调节了早期感觉成分和可能与情绪反应相关的晚期成分。此外，在寻找直视目标的受试者中记录到了N2pc，它是注意力分配的可靠指标，但在寻找回避凝视目标的受试者中，该指标大幅降低。总之，寻找直视目标的效率源于直视凝视所引起的注意力捕获和对其的有效处理。
