Temporospatial dissociation of Pe subcomponents for perceived and unperceived errors.
Temporospatial dissociation of Pe subcomponents for perceived and unperceived errors.
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DOI：
10.3389/fnhum.2012.00178
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发表时间：
2012
影响因子：
2.9
通讯作者：
Kathmann N
中科院分区：
文献类型：
--
作者：
Endrass T;Klawohn J;Preuss J;Kathmann N
以往的研究表明，性能监测错误之后，由最初的额中央负偏转（错误相关的负，ERN或Ne）和随后的中央顶叶的积极性（错误的积极性，Pe）。它已被证明，错误意识主要影响PE，而ERN似乎不受有意识的错误意识。本研究的目的是探讨ERN和Pe与错误意识的关系，在视觉大小辨别任务中，错误不是由冲动反应引起的，而是由知觉困难引起的。此外，我们采用了时空主成分分析（PCA），以检查是否时空的子组件的Pe差异与错误意识。事件相关电位（ERP）的结果与早期的研究一致：一个显着的错误意识效果被发现的PE，但不是ERN。有趣的是，在正确的试验中发现了错误感知的调制：被认为是不正确的正确反应比被认为是正确的正确反应具有更大的正确相关负波（CRN）和更大的Pe振幅。PCA产生了两个相关的空间因素占Pe（潜伏期300毫秒）。一个时空因素的特点是一个中心-顶叶的积极变化显着的错误意识。在与ERN和CRN相对应的两个时空因子中，一个中心地形因子随反应正确性和对正确反应的主观错误感知而变化。主成分分析的结果表明，错误意识的影响是具体相关的中央-顶叶子组件的Pe。由于这一部分也被证明与错误的重要性有关，目前的变化与错误意识表明，这一部分是敏感的显着性的错误，显着性其次可能会触发错误意识。
Previous research on performance monitoring revealed that errors are followed by an initial fronto-central negative deflection (error-related negativity, ERN or Ne) and a subsequent centro-parietal positivity (error positivity, Pe). It has been shown that error awareness mainly influences the Pe, whereas the ERN seems unaffected by conscious awareness of an error. The aim of the present study was to investigate the relation of ERN and Pe to error awareness in a visual size discrimination task in which errors are not elicited by impulsive responding but by perceptual difficulty. Further, we applied a temporospatial principal component analysis (PCA) to examine whether the temporospatial subcomponents of the Pe would differentially relate to error awareness. Event-related potential (ERP) results were in accordance with earlier studies: a significant error awareness effect was found for the Pe, but not for the ERN. Interestingly, a modulation with error perception on correct trials was found: correct responses considered as incorrect had larger correct-related negativity (CRN) and lager Pe amplitudes than correct responses considered as correct. The PCA yielded two relevant spatial factors accounting for the Pe (latency 300 ms). A temporospatial factor characterized by a centro-parietal positivity varied significantly with error awareness. Of the two temporospatial factors corresponding to ERN and CRN, one factor with central topography varied with response correctness and subjective error perception on correct responses. The PCA results indicate that the error awareness effect is specifically related to the centro-parietal subcomponent of the Pe. Since this component has also been shown to be related to the importance of an error, the present variation with error awareness indicates that this component is sensitive to the salience of an error and that salience secondarily may trigger error awareness.
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