简化类Emoji面孔识别特征调控的ERP研究

ERP Study on the Regulation of Facial Recognition Features of Simplified Emoji Faces

摘要: 目的：探究简化emoji人脸是否能引起面孔识别脑区和一般人脸相似的变化，面孔倒置效应是否存在。方法：使用结合emoji表情特征的简化面孔图片，通过调控眉毛旋转角度、眼睛与嘴巴之间距离及图片方向，对34名大学生使用ERP记录并观察N170的波幅及潜伏期的变化情况。结果：在各个条件下，右侧脑区的平均波幅显著大于左侧脑区，潜伏期更短；倒置面孔刺激的平均波幅显著大于正立面孔刺激，潜伏期更长。结论：大脑对面孔的识别受到特征之间的位置及形状的影响，简化的面孔图片依然能够引起大脑类似于正常人脸的反应，面孔识别的倒置效应和大脑的偏侧化优势依然存在。

Abstract: Objective: To explore whether simplified emoji faces can cause similar changes in the brain regions responsible for facial recognition as normal faces and whether the face inversion effect exists. Methods: Using simplified face images combined with emoji expression features, the rotation angle of eyebrows, the distance between eyes and mouth, and the direction of the images were controlled. ERP was used to record 34 college students and observe the changes in the amplitude and latency of N170. Results: Under all conditions, the average amplitude of the right brain region was significantly greater than that of the left brain region, and the latency was shorter; the average amplitude of inverted face stimuli was significantly greater than that of upright face stimuli, and the latency was longer. Conclusion: The brain’s recognition of faces is affected by the position and shape of features. Simplified face images can still cause similar responses in the brain as normal faces, and the face inversion effect and the brain’s lateralization advantage still exist.