一种新的提取事件相关电位的退同步平均技术

指出了传统事件相关电位研究中的突现刺激会诱发外源性成分污染内源性认知成分 ,并导致注意自动俘获 .通过让符号串相对于视线移动来模拟自然阅读 ,发现了字符串中的串首和串尾符号会诱发出外源性成分 ,但串中的准持续呈现字符不会诱发外源性成分 .在此基础上 ,提出了一种去同步平均技术 ,利用该技术能够消除外源性成分干扰和注意的自动俘获 ,直接提取内源性认知成分

A New Desynchronized Averaging Technique to Extract Event-Related Potentials

Stimuli with abrupt onset in traditional visual event related potential studies would evoke exogenous components to contaminate endogenous cognition components and capture attention automatically. Through imitating natural reading by translating a symbol string relative to sightline, we found that the head and the end symbol of a string did evoke exogenous components but quasi persistently presented symbols among a symbol string did not. Based on such findings a desynchronized averaging technique was developed, by which the endogenous cognition components can be extracted directly without contamination of exogenous ones.