Relationship between Visual Evoked Potentials and Subjective Differences between Emotional Expressions in “Face Diagrams”
Relationship between Visual Evoked Potentials and Subjective Differences between Emotional Expressions in “Face Diagrams”
复制标题
“面部图”中视觉诱发电位与情绪表达主观差异的关系
DOI：
--
复制
发表时间：
2001
影响因子：
--
通讯作者：
E. N. Sokolov
中科院分区：
文献类型：
--
作者：
Ch. A. Izmailov;S. G. Korshunova;E. N. Sokolov
视觉诱发电位之间的关系进行了研究，从替代的一个图像的人类“人脸图”的另一个和这些面孔的情感表达之间的感知差异的评估。通过改变嘴巴的弧度和/或眉毛的斜度来改变情绪。与传统的方法，其中记录的视觉诱发电位响应于呈现的一个单一的刺激承载的人脸图像，在本研究中的视觉诱发电位被记录为一个参考刺激与测试刺激的瞬时替代的反应，因此代表的直接反应之间的差异刺激。这种方法的一个特点是使用了一系列功能相关的测试刺激，其中有一个单调增加的测试和参考图像之间的差异方面的变量特性的刺激。分析显示，在导联O 1、O2、P3、P4、T5和T6中，P120、N180和P230峰的幅度存在差异，这表明了高水平的相关性，无论是与面部情绪表达之间的感知差异的分数量表评估，还是与身体相同面部的图像之间的（构型）差异，如由确定嘴部曲率和眉毛角度的线的取向角度的差异所定义的。反应被视为两种类型的变化对图像的刺激之间的差异，无论是从参考图像到测试图像和从测试图像到参考图像。在两个半球的颞区的P120-N180电位的峰间振幅的变化提供了最早的电生理测量的感知人类面部表情之间的差异。这表明应用球形模型来感知情绪[4]，以根据线方向检测器的活动来指定情绪面部表情。
The relationship between visual evoked potentials resulting from substitution of one image of a human “face diagram” for another and assessment of perceived differences between the emotional expressions of these faces were studied. Emotions were altered by changing the curvature of the mouth and/or the slope of the brows. Unlike the traditional approach, in which visual evoked potentials are recorded in response to presentation of a single stimulus bearing a face image, visual evoked potentials in the present study were recorded as the response to instantaneous substitution of a reference stimulus with a test stimulus, and thus represented the direct response to the difference between the stimuli. A characteristic of this approach was the use of a series of functionally associated test stimuli, in which there was a monotonic increase in the difference between the test and references images in terms of the variable characteristics of the stimuli. Analysis revealed differences in the amplitudes of the P120, N180, and P230 peaks in leads O1, O2, P3, P4, T5, and T6, which demonstrated high levels of correlation both with a points-scale assessment of perceived differences between the emotional expressions of faces and with the physical (configurative) differences between images of the same faces as defined by the differences in the orientation angles of lines determining mouth curvature and brow angle. Responses were seen to differences between stimuli for both types of change in pairs of images, both going from reference image to test image and from test image to reference image. Changes in the interpeak amplitude of the P120-N180 potential in the temporal areas of both hemispheres provided the earliest electrophysiological measure of perceived differences between the emotional expressions of human faces. This suggests application of the spherical model for the perception of emotions [4] to specify emotional facial expressions in terms of the activity of line orientation detectors.