摘要
采用修正的"跨通道延迟反应"实验范式,探讨卡通表情能否诱发视觉失匹配负波(VMMN)及表情信息自动加工机制。两种短纯音与三种卡通表情图片伪随机排列,分时呈现,受试者听到刺激后,迅速对刺激类型做出判断并作好按键准备,当出现反应命令信号后尽快按键,听觉刺激与反应命令信号之间插入0～2个卡通表情图片。结果发现,视觉偏差刺激(愉快、愤怒表情)事件相关电位(ERP)减去标准刺激(中性表情)ERP得到两种VMMN,愤怒表情诱发的VMMN较愉快表情诱发的VMMN更负,两者存在左半球偏侧趋势,表明卡通表情可以诱发出VMMN,表情信息能被自动加工。
A modified ＂cross-modal delayed response＂ paradigm was used to investigate whether the visual mismatch negativity can be elicited by cartoon facial expressions, and to define the mechanism underlying automatic processing of facial expressions. Subjects taking part in the tests were instructed to discriminate the type of the tones they heard as quickly and accurately as possible, and to act merely when they heard the response imperative signal. Neutral, happy and angry faces were presented during intervals between a tone and a response imperative signal. Visual mis- match negativity （VMMN） was obtained by subtracting the event - related potential （ERP） elicited by neutral faces from that elicited by happy faces or angry faces. The angry-related VMMN was more negative than happy-related VMMN, and both were more negative in the left than in the right cerebral hemisphere. The results indicated that VMMN can be elicited by the cartoon facial expressions, and the facial expressions can be processed automatically.
出处
《生物医学工程学杂志》
EI
CAS
CSCD
北大核心
2013年第3期476-480,共5页
Journal of Biomedical Engineering
基金
国家自然科学基金资助项目(90820016)
关键词
表情
事件相关电位
视觉失匹配负波
自动加工
Facial expression
Event-related potential （ERP）
Visual mismatch negativity （VMMN）
Automatic processing
