摘要
以往事件相关电位（ＥＲＰ）研究主要对峰波幅和峰潜伏期进行测量，本研究用人像照片按一定概率编排成刺激序列，成功诱发幼儿ＥＲＰ，并在此基础上对Ｐ３面积进行了测量。结果证明，低概率非靶刺激在幼儿可以诱发出Ｐ３，与任务Ｐ３相比波面积小，提示幼儿Ｐ３波面积有明显的任务效应，再认熟悉人的Ｐ３面积大于再认陌生人，波面积比波幅更合理地反映场合修正量。幼儿在高度选择注意时，Ｐ３面积大。幼儿Ｐ３波面积以Ｐｚ、Ｏｚ电极所描记的为大。
Previously,event-related potential (ERP) are done mainly to detect the peak latency and the peak amplitude.In the present study,ERP was succesfully elicited by human photoes and the P 3 area was measured.P 3 could be elicited by low probability non-target stimuli,and the area was smaller than that of task P 3,suggesting that P 3 area had an apparent task effect and P 3 area of recognizing familiar photo was larger than recognizing strange women.In addition,the wave area reflected the amount of revising the situlation more reasonably than the wave amplitude.P 3 area,especially Pz and Oz,was larger when the children highly selected attention.
