Dissociable correlates of response conflict and error awareness in error-related brain activity.
Dissociable correlates of response conflict and error awareness in error-related brain activity.
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DOI：
10.1016/j.neuropsychologia.2010.11.036
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发表时间：
2011-02
期刊：
影响因子：
2.6
通讯作者：
Yeung N
中科院分区：
文献类型：
--
作者：
Hughes G;Yeung N
快速决策任务中的错误与大脑活动的特征模式有关。在头皮记录的脑电中，错误处理反映在两个分量中，错误相关负波（ERN）和错误正波（Pe）。这些成分已经被广泛研究，但关于它们反映的错误处理的确切方面仍然存在争议。本研究探讨了ERN和Pe之间的关系，使用一种新版本的侧翼任务，允许错误之间的比较，反映不同的原因-反应冲突与刺激掩蔽。冲突和面具条件相匹配的整体行为表现，但不同的基本反应动力学，索引的反应时间分布和措施的偏侧运动活动。ERN振幅变化的关系，这些不同的响应动态，显着更大的冲突条件相比，面具条件。此外，参与者之间的反应动力学的差异是预测ERN振幅的调制。相比之下，Pe活动在不同条件下变化不大，但在与参与者对错误的意识有关的试验中变化很大。两者合计，这些研究结果表明，ERN和PE之间的解离，前者反映了动态的反应选择和冲突，后者反映了有意识的认识错误。
Errors in speeded decision tasks are associated with characteristic patterns of brain activity. In the scalp-recorded EEG, error processing is reflected in two components, the error-related negativity (ERN) and the error positivity (Pe). These components have been widely studied, but debate remains regarding the precise aspects of error processing they reflect. The present study investigated the relation between the ERN and Pe using a novel version of the flanker task to allow a comparison between errors reflecting different causes—response conflict versus stimulus masking. The conflict and mask conditions were matched for overall behavioural performance but differed in underlying response dynamics, as indexed by response time distributions and measures of lateralised motor activity. ERN amplitude varied in relation to these differing response dynamics, being significantly larger in the conflict condition compared to the mask condition. Furthermore, differences in response dynamics between participants were predictive of modulations in ERN amplitude. In contrast, Pe activity varied little between conditions, but varied across trials in relation to participants‘ awareness of their errors. Taken together, these findings suggest a dissociation between the ERN and Pe, with the former reflecting the dynamics of response selection and conflict, and the latter reflecting conscious recognition of an error.
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