ERP evidence for task modulations on face perceptual processing at different spatial scales
ERP evidence for task modulations on face perceptual processing at different spatial scales
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DOI：
10.1016/s0364-0213(03)00002-8
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发表时间：
2003-03-01
影响因子：
2.5
通讯作者：
Schyns, PG
中科院分区：
文献类型：
--
作者：
Goffaux, V;Jemel, B;Schyns, PG
面孔的知觉加工是否灵活地适应手头的分类任务的要求，或者它是否独立于这种认知背景而运作？行为研究表明，精细和粗糙的空间尺度的脸的差异处理取决于分类任务执行，从而表明后者可以影响刺激感知。在这里，我们通过检查视觉N170面孔敏感事件相关电位（ERP）来研究这些任务对知觉处理影响的时间过程，同时观察者根据性别和熟悉度对面孔进行分类。刺激是全光谱的，或者是过滤的版本，保留了面部的粗尺度或细尺度信息。行为的结果复制了以前的研究结果的差异处理的粗和细的空间尺度跨任务。此外，N170振幅较大的性别任务相比，熟悉任务的LSF面孔专门，从而表明，任务要求差异调制的空间尺度处理的面孔。这些结果表明，分类任务中尺度特异性线索的诊断性可以调节面孔加工。(C)2003年认知科学学会All rights reserved.
Does the perceptual processing of faces flexibly adapt to the requirements of the categorization task at hand, or does it operate independently of this cognitive context? Behavioral studies have shown that the fine and coarse spatial scales of a face are differentially processed depending on the categorization task performed, thus suggesting that the latter can influence stimulus perception. Here, we investigated the time course of these task influences on perceptual processing by examining the visual N170 face-sensitive Event-Related Potential (ERP), while observers categorized faces for their gender and familiarity. Stimuli were full spectrum, or filtered versions that preserved either coarse or fine scale information of the faces. Behavioral results replicated previous findings of a differential processing of coarse and fine spatial scales across tasks. In addition, the N170 amplitude was larger in the Gender task as compared to the Familiarity task for LSF faces exclusively, thus showing that task demands differentially modulated the spatial scale processing on faces. These results suggest that the diagnosticity of scale-specific cues in categorization tasks can modulate face processing. (C) 2003 Cognitive Science Society, Inc. All rights reserved.