A computational study of conflict-monitoring at two levels of processing: Reaction time distributional analyses and hemodynamic responses
A computational study of conflict-monitoring at two levels of processing: Reaction time distributional analyses and hemodynamic responses
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DOI：
10.1016/j.brainres.2007.06.068
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发表时间：
2008-04-02
期刊：
影响因子：
2.9
通讯作者：
Davelaar, Eddy J.
中科院分区：
文献类型：
--
作者：
Davelaar, Eddy J.
认知控制的冲突监测假说提出，反应冲突是更高的不一致的条件下相比，一致或中性条件下，冲突的增加，导致在随后的审判控制增加。一个神经计算模型是用来解决数据的反应时间分布和血液动力学反应的侧翼任务与中性（N），一致（CO），刺激不一致（SI），反应不一致（RI）的试验，允许调查的刺激和反应冲突。提出了一种计算研究，其中冲突信号是（a）计算在每个级别的处理（响应，刺激）和（B）用于调制在同一试验中的输入。结果表明，模型捕获（1）在行为文献中看到的分布图的轮廓和（2）在神经影像学文献中看到的血流动力学反应的模式。基于模拟结果，我们认为前额叶皮层处理反应冲突，顶叶皮层处理刺激冲突。(C)2007 Elsevier B.V.保留所有权利。
The conflict-monitoring hypothesis of cognitive control proposes that response-conflict is higher in incongruent conditions compared to congruent or neutral conditions and that increases in conflict lead to increased control on subsequent trials. A neurocomputational model is used to address data on reaction time distributions and hemodynamic responses in a flanker task with neutral (N), congruent (CO), stimulus-incongruent (SI), and response-incongruent (RI) trials, allowing investigation of stimulus- and response-conflict. A computational study is presented in which the conflict-signal is (a) computed at every level of processing (response, stimulus) and is (b) used to modulate the input in the same trial. Results show that the models capture (1) the profile of distributional plots seen in the behavioral literature and (2) the patterns of hemodynamic responses seen in the neuroimaging literature. Based on the simulations it is suggested that the prefrontal cortex processes response-conflict and that the parietal cortex processes stimulus-conflict. (C) 2007 Elsevier B.V. All rights reserved.