Soria Bauser Denise A, Schriewer Elisabeth, Suchan Boris
Institute of Cognitive Neuroscience, Department of Neuropsychology, Ruhr University Bochum, Germany.
Br J Psychol. 2015 Aug;106(3):414-32. doi: 10.1111/bjop.12101. Epub 2014 Oct 20.
Several studies have reported similarities between perceptual processes underlying face and body perception, particularly emphasizing the importance of configural processes. Differences between the perception of faces and the perception of bodies were observed by means of a manipulation targeting a specific subtype of configural processing: the composite illusion. The composite face illusion describes the fact that two identical top halves of a face are perceived as being different if they are presented with different bottom parts. This effect disappears, if both halves are laterally shifted. Crucially, the effect of misalignment is not observed for bodies. This study aimed to further explore differences in the time course of face and body perception by using the composite effect. The present results replicated behavioural effects illustrating that misalignment affects the perception of faces but not bodies. Thus, face but not body perception relies on holistic processing. However, differences in the time course of the processing of both stimulus categories emerged at the N170 and P200. The pattern of the behavioural data seemed to be related to the P200. Thus, the present data indicate that holistic processes associated with the effect of misalignment might occur 200 ms after stimulus onset.
多项研究报告了面部和身体感知背后的知觉过程之间的相似性，特别强调了构型加工的重要性。通过针对构型加工的一种特定亚型进行操纵，即合成错觉，观察到了面部感知和身体感知之间的差异。合成面部错觉描述了这样一个事实：如果面部的两个相同上半部分与不同的下半部分呈现在一起，它们会被感知为不同。如果两半部分横向移动，这种效果就会消失。至关重要的是，对于身体，未观察到错位效应。本研究旨在通过使用合成效应进一步探索面部和身体感知时间进程的差异。目前的结果重复了行为效应，表明错位会影响面部感知，但不会影响身体感知。因此，面部感知而非身体感知依赖于整体加工。然而，在N170和P200处，两种刺激类别的加工时间进程出现了差异。行为数据的模式似乎与P200有关。因此，目前的数据表明，与错位效应相关的整体加工可能在刺激开始后200毫秒出现。
