北京生物医学工程

基于事件相关电位P1的人脸视觉信息早期加工研究

Understanding the face perception in the early stage through P1

作者：李航梁栗炎张旭高小榕

单位：

分类号：R318.04

出版年·卷·期（页码）：2016·35·6（551-561）

摘要：

目的探索事件相关电位的P1成分能否反映人脸处理加工和非人脸物体处理加工的差异，为事件相关电位P1成分的研究提供新信息。方法本研究确保低级视觉刺激相的同时，在两种不同刺激清晰度的条件下对受试进行汽车和人脸图像类别的二分类检测任务。基于事件相关电位P1成分结合行为学结果，探索两种刺激类别在感知、决策的异同。结果事件相关电位的结果表明,人脸和汽车刺激类别对应的P1成分幅值在不同刺激清晰度下均有统计差异，而在相同刺激类别下不同刺激清晰度的P1幅值均无统计差异。结论事件相关电位和行为学结果均表明，人脸的处理加工机制和非人脸物体的处理加工机制不相同，且这种差异在P1成分已有体现。

Objective To solve the controversy whether the P1 reflects the different perception mechanisms between human face and non-face object and to provide more evidences for it. Methods The subjects classified the face or car images with the same low-level visual stimuli at two different phase-coherent, during which the event-related potentials and behavior data were recorded to explore the differences of perception and decision for face and car stimuli. Results The event-related potential results suggested that different stimulus types but not different stimulus phase-coherent elicited different P1 amplitudes. Conclusions Both the behavior results and the event-related potential results suggest that P1 reflects the different perception mechanisms between human face and non-face object.

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