Department of Communication Sciences and Disorders, University of South Florida, 4202 E. Fowler Ave.,Tampa, FL 33620, USA.
Psychophysiology. 2011 Dec;48(12):1611-20. doi: 10.1111/j.1469-8986.2011.01264.x. Epub 2011 Aug 1.
We report the results of an experiment designed to elucidate the extent to which the error related ERP components are affected by response and stimulus similarity. We examined the ERPs under varying degrees of mismatch between the representations of actual and appropriate responses. We replicated the design used in an earlier study, which demonstrated that response similarity rather than stimulus similarity affected the amplitude of the error related negativity (ERN). We report the results of a spatial-temporal principal component analysis (PCA), which indicates that response similarity affects the amplitudes of the ERN and the fronto-central positive component, but not those of the P300 and the frontal negativity. The results provide evidence to suggest that the ERN and the proceeding positive deflection are error related and are sensitive to the degree of the committed error, whereas the P300 and the frontal negativity are not.
我们报告了一项旨在阐明错误相关 ERP 成分受反应和刺激相似性影响程度的实验结果。我们在实际反应和适当反应的表示之间存在不同程度不匹配的情况下检查了 ERP。我们复制了早期研究中使用的设计，该研究表明，是反应相似性而不是刺激相似性影响了错误相关负波（ERN）的振幅。我们报告了时空主成分分析（PCA）的结果，该结果表明反应相似性会影响 ERN 和额中央正成分的振幅，但不会影响 P300 和额负性的振幅。这些结果提供了证据表明，ERN 和随后的正偏移与错误有关，并且对所犯错误的程度敏感，而 P300 和额负性则不是。
