A computational model of anterior cingulate function in speeded response tasks: Effects of frequency, sequence, and conflict
A computational model of anterior cingulate function in speeded response tasks: Effects of frequency, sequence, and conflict
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DOI：
10.3758/cabn.2.4.300
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发表时间：
2002-12-01
影响因子：
2.9
通讯作者：
Braver, Todd S.
中科院分区：
文献类型：
--
作者：
Jones, Andrew D.;Cho, Raymond Y.;Braver, Todd S.
越来越多的来自功能神经成像和计算建模研究的证据表明，前扣带回皮质(ACC)检测到反应冲突的存在，并将这一信息传达给其他大脑区域，使随后的认知控制调整成为可能。本研究检验了在三种不同的快速反应任务(两种选择的强迫选择、进行/不进行和古怪)中低频刺激的ACC增加的经验发现。在包含顺序启动机制的神经网络模型(Cho等人，2002年开发)中进行的模拟证实，在所有三个任务的低频试验中，反应冲突的计算测量更高。此外，该模型还捕获了行为反应时和准确度的详细数据，预测了与试验序列效应相关的ACC活动的动态变化，为冲突信息在性能监控和优化中的作用提供了证据。结果表明，冲突监控假说，加上编码刺激历史的机制，可以解释在顺序快速反应任务中与成绩相关的关键现象。
A growing body of evidence from functional neuroimaging and computational modeling studies indicates that the anterior cingulate cortex (ACC) detects the presence of response conflict and conveys this information to other brain regions, enabling subsequent adjustments in cognitive control. The present study examined previous empirical findings of increased ACC for low-frequency stimuli across three distinct speeded response tasks (two-alternative forced choice, go/no-go, and oddball). Simulations conducted in a neural network model incorporating sequential priming mechanisms (developed in Cho et al., 2002) confirmed that a computational measure of response conflict was higher on low-frequency trials across all three tasks. In addition, the model captured detailed aspects of behavioral reaction time and accuracy data, predicted the dynamics of ACC activity related to trial sequence effects, and provided evidence for the functional role of conflict information in performance monitoring and optimization. The results indicate that the conflict-monitoring hypothesis, augmented by mechanisms for encoding stimulus history, can explain key phenomena associated with performance in sequential speeded response tasks.