Electrophysiological measures of conflict detection and resolution in the Stroop task
Electrophysiological measures of conflict detection and resolution in the Stroop task
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DOI：
10.1016/j.brainres.2011.07.017
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发表时间：
2011-09-21
期刊：
影响因子：
2.9
通讯作者：
van Heuven, Walter J. B.
中科院分区：
文献类型：
--
作者：
Coderre, Emily;Conklin, Kathy;van Heuven, Walter J. B.
冲突检测和解决在Stroop任务等认知任务中至关重要。先前的研究已经确定了早期负性成分（N（inc））作为事件相关电位（ERP）中Stroop冲突的一个突出标志。然而，这一机构资源规划部分在多大程度上反映了冲突的发现和（或）解决，目前尚不清楚。在这里，我们报告了一个Stroop任务中，刺激的颜色和文字刺激呈现的起始时间（SOA）被操纵，以解开冲突检测和冲突解决的作用，产生Stroop相关的ERP组件。将单词与颜色信息分开，可以让我们精确控制冲突的时间。如果N（inc）与冲突解决有关，那么当这个词在反应准备过程中出现时，它应该不存在，就像在长潜伏期的积极SOA中一样。我们的数据表明，N（inc）发生在所有SOA中，即使在作出反应后，支持其在检测刺激冲突而不是解决冲突中的作用。因此，SOA操作的使用允许检查更宽的干扰时间谱，以指定该冲突相关组件的功能。这些结果提供了深入了解冲突过程的神经签名，并对大脑中的认知控制机制模型产生影响。(C)2011 Elsevier B.V.保留所有权利。
Conflict detection and resolution is crucial in a cognitive task like the Stroop task. Previous studies have identified an early negativity component (N(inc)) as a prominent marker of Stroop conflict in event-related potentials (ERPs). However, to what extent this ERP component reflects conflict detection and/or resolution is still unclear. Here, we report a Stroop task in which the stimulus onset asynchrony (SOA) of color and word stimuli presentation was manipulated in order to disentangle the roles of conflict detection and conflict resolution in generating Stroop-related ERP components. Separating the word from the color information gives us precise control over the timing of conflict. If the N(inc) is related with conflict resolution it should be absent when the word appears during response preparation, as in a long-latency positive SOA. Our data shows that the N(inc) occurs in all SOAs, even after a response has been made, supporting its role in the detection of stimulus conflict rather than conflict resolution. The use of SOA manipulation therefore allows for the examination of a wider temporal spectrum of interference in order to specify the functions of this conflict-related component. These results provide insight into the neural signatures of conflict processes, and have implications for models of cognitive control mechanisms in the brain. (C) 2011 Elsevier B.V. All rights reserved.