Institut de Recherche Biomédicale des Armées, Antenne Toulon, Toulon, France.
Psychophysiology. 2011 Mar;48(3):293-302. doi: 10.1111/j.1469-8986.2010.01065.x.
The capacity to adjust behavior and evaluate performance in a changing environment is highly related to taking feedback into account. Using feedback is, hence, crucial for different cognitive capacities. The present study focused on feedback processing in hypothetico-deductive reasoning. Electroencephalographical (EEG) activity was recorded while participants performed a hypothesis-testing task in which a feedback signal allowing the evaluation of performance was delivered at each trial. To ameliorate the spatial resolution of EEG signals, the surface Laplacian was estimated. Results showed three distinct patterns of activation. At central and centro-parietal electrodes, the activity was sensitive to participants' expectancies in a binary and a gradual way, respectively. At the parieto-occipital electrode, the activity was sensitive to the evaluation of performance itself: correct versus false. In conclusion, the processing of feedback signal depends on at least three separate processes.
在不断变化的环境中调整行为和评估表现的能力与考虑反馈密切相关。因此，使用反馈对于不同的认知能力至关重要。本研究专注于假设演绎推理中的反馈处理。当参与者在假设检验任务中执行时，记录了脑电图 (EEG) 活动，在该任务中，每个试验都会提供反馈信号，以评估表现。为了提高 EEG 信号的空间分辨率，估计了表面拉普拉斯。结果显示出三种不同的激活模式。在中央和中央顶电极，活动分别以二进制和渐进的方式对参与者的期望敏感。在顶枕电极，活动对自身表现的评估敏感：正确与错误。总之，反馈信号的处理至少取决于三个不同的过程。
