负面身体自我女性对身体信息的记忆偏向：来自ERP研究的证据

Memory Bias toward Body Information in Women with Negative Physical Self: Evidence from an ERP Study

采用事件相关电位（ERPs）技术探讨了负面身体自我女性（大学生）对胖-瘦两类身体图片进行再认时的脑内时程动态变化。结果发现，相对于控制组（正常女大学生），胖负面身体自我女大学生在750~800ms的时间窗口内，胖图比瘦图诱发出一个更正的ERP波形，差异波的地形图显示该正成分在中前部有更强的激活。进一步对差异波作偶极子溯源分析，结果发现，该正成分主要起源于右侧枕叶附近。这似乎表明，右侧枕叶的激活与身体自我信息的出现有关，与负面身体自我图式的体验有关 。

Behavior research evidence has shown that people with a negative physical self have a cognitive bias with a longer reaction time to body information than to neutral information. Chen (2005) indicated that participants with a fat negative physical self have a cognitive preference and selectively perceived body information; however， the underlying mechanism of this phenomenon has not been discussed further. Therefore， the aim of this study is to reveal the brain mechanism of negative physical self