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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。
In the past, ERPs were mainly used to measure the peak amplitude and peak latency. In this study, portrait photographs were used to arrange stimulation sequences according to a certain probability. ERPs were successfully induced in children and P3 area was measured. The results show that low probability of non-target stimulation can induce P3 in infants, compared with task P3 wave area is small, suggesting that P3 wave area of young children have a clear mission effect, then recognize the familiar P3 area is greater than the re-recognition of strangers, wave area More than the amplitude of the scene to reflect the amount of correction. P3 in a high degree of attention when young children, large area. P3 wave area in children with Pz, Oz electrode is described as large.