The Event-Related Potentials Studies Of Facial Expression Processing Of Students In Secondary Schools And Universities

Facial expression is a kind of important social stimulus in human interactions, facial expression is also one particular communication means and emotion-regulation means with adaptive value. Facial expression processing is one important aspect of affective psychology studies, as well as one of the hot issues in cognitive neurosciences.The paper applied the event-related potentials studies, with facial pictures of different emotional value and intensity and with non-facial pictures. And the subjects were students from junior secondary schools , senior secondary schools and universities. The researches systemically discussed the characteristics of affective faces processing of students in secondary schools and universities and influence factors. There were significant results as follow.(1) During faces-non-faces discrimination task, facial effects appeared at 120-190 millisecond after stimulus and distributed in occipital-temporal areas. Facial discrimination with obvious N170 indicated that facial processing and non-facial processing with different mechanism were segregative. In addition, under condition of non-discrimination facial expression, there were not significant differences among the peak amplitude and latency of N170 of different emotional faces, which indicated that under condition of non-discrimination facial expression, N170 wasn't regulated by facial emotion content.(2) During emotional-neutral faces discrimination task, there were three finds. Firstly, there were not significant differences between N170 of emotional faces and that of neutral faces at 120-190 millisecond after stimulus, which indicated that under condition of non-discrimination emotional faces, N170 wasn't regulated by facial emotion content. Secondly, affective effects appeared at 200-600 millisecond after...