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目的：了解不同类型刺激对健康青少年事件相关电位的影响。方法：对60名健康青少年志愿者做单音、图像及汉字结构识别视觉刺激（靶刺激为有“氵”结构的汉字）的事件相关电位研究。结果：（1）单音刺激，P3潜伏期无性别差异（P＞0．05）；图像刺激，女性的P3潜伏期较男性短（P＜0．05）；汉字结构刺激，女性的P3潜伏期（Fz，Cz，Pz）较男性短（P＜0．05）；三种刺激的RT无性别差异（P＞0.05）；（2）汉字结构刺激与图像刺激比较：汉字结构刺激的N2潜伏期及RT均长于图像刺激（P＜0.05）。男性；两种刺激的P3潜伏期无显著差异（P＞0．05）；女性：汉字结构的P3潜伏期（C3，C4，Cz，Pz）长于图像刺激（P＜0．05）。结论：P3的性别差异随刺激不同而变化。汉字结构识别刺激的认知过程要比图像刺激耗时长。
Objective: To understand the effects of different types of stimuli on the event-related potentials of healthy adolescents. Methods: 60 healthy adolescents volunteers did mono-tone, image and Chinese character recognition visual stimulation (the target stimulus was “氵” structure of Chinese characters) event-related potential study. Results: (1) There was no significant difference in P3 latency between single tone stimulation and P3 latency (P> 0.05); Image stimulation, P3 latency of female was shorter than that of male (P <0.05) , Cz, Pz) were shorter than those in male (P <0.05). There was no significant difference in RT among the three stimuli (P> 0.05). (2) Comparison of Chinese word structure stimulus and image stimulus: Longer than image stimulation (P <0.05). (P> 0.05). In female, the P3 latency (C3, C4, Cz, Pz) of Chinese character structure was longer than that of image stimulus (P <0.05). Conclusion: The gender differences in P3 vary with different stimuli. The cognitive process of Chinese character recognition stimulation is longer than the image stimulation.