摘要
目的:运用事件相关电位(ERPs)技术探讨汉词再认新旧效应的性别差异及其脑机制。方法:30名大学生(男女各半)参与汉词再认测验,同时记录EEG,离线处理数据后比较男女被试诱发出的ERPs主要成分及其新旧效应。结果:女性P500波幅显著大于男性(F=12.76,P<0.001),潜伏期短于男性(F=3.589,P<0.05)。男女被试在350-600ms均诱发出了显著的顶区新旧效应,但男性呈显著左侧优势,女性则更为双侧化。仅男性诱发出了显著的额区新旧效应,呈负走向变化,头皮分布呈右侧优势。结论:汉词再认的ERP新旧效应存在性别差异。这种性别差异可能既与信息提取速度及强度的差异有关,也与不同性别的神经解剖结构差异有关。
Objective： To study the gender differences in ERPs recorded during a recognition task for Chinese words. Methods： 15 male and 15 female healthy volunteers received a Chinese words recognition task and the EEG signals were recorded from 20 scalp sites simultaneously. The stimuli were meaningful words consisting of two Chinese characters. Results： Both men and females showed a positive-going parietal old/new effect, but females demonstrated larger P500 amplitudes and shorter P500 latency than males. Furthermore, the parietal old/new effect of males was significantly left-lateralized, while that of females showed more bilateral pattern. Only males elicited obvious frontally distributed old/new effect between 250 and 350 ms, which was negative-going and right-lateralized. Conclusion： Gender differences do exist in the recognition processing of Chinese words. Some of the gender differences could be interpreted as reflecting different strengths and speed of brain activation and others could be interpreted as reflecting the involvement of different neural structures.
出处
《中国心理卫生杂志》
CSSCI
CSCD
北大核心
2005年第11期769-773,共5页
Chinese Mental Health Journal
关键词
性别差异
再认
事件相关电位(ERP)
新旧效应
Gender difference
Recognition
Event-related potentials （ERPs）
Old/new effects
