Sun Gang, Zhang Guoping, Yang Yanjie, Bentin Shlomo, Zhao Lun
Department of Medical Imaging, Jinan Military General Hospital, Jinan, Shandong, China.
Brain Topogr. 2014 Sep;27(5):663-71. doi: 10.1007/s10548-013-0348-0. Epub 2013 Dec 29.
The current study investigated the time course of the other-race advantage (ORA) in the subordinate classification of faces by race. A significant ORA was found on RTs for both races. The ERP data showed that the categorization processes follow basic level classification of physiognomic stimuli, which is not influenced by the stimulus race. The most conspicuous difference between own-race and other-race faces was found in the modulation of the amplitude of the P3. Since the amplitude of the P3 is sensitive primarily to the perceptual demands of a task, these data suggest that the delay of the own-race classification is caused by an own-race specific process that precedes or interferes with the subordinate classification.
本研究调查了在按种族对面部进行从属分类时异族优势（ORA）的时间进程。在两个种族的反应时上均发现了显著的异族优势。事件相关电位（ERP）数据表明，分类过程遵循对面部特征刺激的基本水平分类，且不受刺激种族的影响。在P3波幅的调节方面，发现本族面孔与异族面孔之间最明显的差异。由于P3波幅主要对任务的感知需求敏感，这些数据表明本族分类的延迟是由一个先于或干扰从属分类的本族特定过程导致的。
