目的比较不同熟悉程度人面照片所诱发的视觉P300的差异。方法应用事件相关电位仪测定33名受试者的视觉P300。以熟悉者照片作为靶刺激,陌生者照片为对照刺激,记录不同刺激时的潜伏期和电位波幅。结果受试者的视觉P300波形较稳定。33名健康被试者中,肯定阳性22例(66.7%),阳性8例(24.2%),阴性仅3例(9.1%)。结论视觉P300对司法精神病学有一定的参考作用。 Objective To compare the difference of visual P300 induced by human face pictures of different familiarities. Methods The visual P300 was measured in 33 subjects using event-related potentiometry. To familiar photo as a target to stimulate strangers photos for the control of stimulation, recording different stimuli latency and potential amplitude. Results Subjects visual P300 waveform is more stable. Of the 33 healthy subjects, 22 were positive (66.7%), 8 were positive (24.2%) and 3 were negative (9.1%). Conclusion Visual P300 has some reference to judicial psychiatry.