【作者】 季文君；

【导师】 冯成志；

【作者基本信息】 苏州大学 ， 基础心理学， 2013， 硕士

【摘要】 面孔表情（facial expression）和眼睛视向（gaze-direction）是面孔知觉中的两个最重要的动态特征，我们总是通过观察对方的视向和表情来推测其心理意图。鉴于这两种非语言的社会交流方式均为自动化加工的，且均含有接近-回避的趋向，因此本研究选择了高兴和害怕这两类典型的接近型趋向和回避型趋向的表情分别与直视朝向和转移朝向的眼睛相结合，将两种加工过程整合在一起考察，旨在探索表情加工和视向加工的相互关系，同时考察其时间进程。实验一目的是筛选出表情（害怕和高兴）可辨度匹配的刺激材料用于正式实验，发现75%强度的两种类型表情在反应速度上是一致的。实验二和实验三采用修改过的Garner范式，探讨视向和表情两者是否存在干扰或者促进作用，基线水平下只有一个维度发生变化，而混合水平下两个维度都有变化，被试分别完成视向判断和表情判断任务。实验二行为实验的结果发现：（1）视向加工速度比情绪加工速度慢；（2）视向与情绪的联合加工显著受任务的影响，视向判断任务中没有表情主效应，而表情判断任务则有显著的表情主效应和视向主效应，表现为高兴表情的加工优势和直视的加工优势；（3）视向和情绪相互作用的不对称性，体现在视向促进情绪加工，没有发现情绪对视向的促进或干扰。实验三ERP实验的结果发现：（1）有显著的面孔加工情绪效应，主要包括P1效应、N170效应、LPC效应，没有发现显著的视向效应；（2）情绪加工和视向加工在时间进程上的差异体现在后期，情绪加工的晚期正慢波比视向加工提前出现100ms。本研究主要得出以下结论：(1)对眼睛注视方向的加工具有直视优势效应，但是该效应具有情境性，而且在大脑激活水平上没有体现，支持快速追踪调制理论模型。(2)面孔表情加工在反应时上表现为高兴面孔的加工优势，而从大脑皮质诱发的角度上则在早期就表现出了负性偏向，害怕引起的振幅更高。(3)面孔表情与视向的互相作用模式是否对称与刺激的可辨度，情绪唤醒度有很大关联，在本研究中发现了不对称的促进模式，视向对表情加工产生显著促进作用且与表情无关。更多还原

【Abstract】 Eyes are central to various aspects of face processing, including face perception,gender discrimination, identity recognition and facial expression discrimination, and facialexpression and gaze-direction are two important dynamic aspects of human faces.Expressions communicate the internal emotional state of others while gaze-direction offerscues to their attentional focus and future intentions.Here we explored the relationship between the processing of facial expression and theprocessing of gaze-direction. In the current study24subjects were instructed to judge thegaze-direction (direct or averted gaze) or expression (happy or fear) of presented faceswhile we recorded reaction time and brain potentials with event-related potential(ERP)technique.Behavioral results confirmed the prediction that gaze-direction facilitated theprocessing of facially emotional expressions (both fear and happy), however, emotionalexpression had no reciprocal influence on judgment of gaze-direction. Data of ERPsrevealed that amplitudes elicited by fearful faces were larger than those elicited by happyfrom very early stage even from about100ms, consistent with the presence of a ‘negativitybias’. Even we found that direct gaze faces were recognized faster than averted-gaze faces,but this effect of direct gaze had little demonstration in brain potentials. The brain waves ofgaze and emotional expressions are integrated at the early stages of visual processing, andthese two processing streams were dissociable at no earlier than300ms. The late positivecomponent of emotional processing appeared earlier than that of gaze-direction processing,consistent with the behavioral results that RTs for expression judgements were faster thangaze-direction judgements.更多还原