Department of Psychology, Haverford College, Haverford, Pennsylvania 19041, USA.
Psychophysiology. 2011 May;48(5):583-90. doi: 10.1111/j.1469-8986.2010.01124.x. Epub 2010 Sep 15.
This study used electroencephalogram (EEG) power spectrum analyses to characterize neural activity during the intertrial interval, a period during which online cognitive adjustments in response to errors or conflict are thought to occur. EEG alpha power was quantified as an inverse index of cerebral activity during the period between each response and the next stimulus in a Stroop task. Alpha power was significantly reduced following error responses compared to correct responses, indicating greater cerebral activity following errors. Reduced alpha power was also observed following Stroop conflict trials compared to no-conflict trials, suggesting that conflict engages processes of mental adjustment. Finally, hemispheric differences in alpha power during the intertrial interval supported the complementary roles of the left and right hemispheres in behavioral activation and inhibition.
本研究使用脑电图（EEG）功率谱分析来描述试验间间隔期间的神经活动，在此期间，据认为会针对错误或冲突进行在线认知调整。在 Stroop 任务中，每次反应与下一个刺激之间的时间段内，EEGα 功率被量化为大脑活动的倒数指标。与正确反应相比，错误反应后的α 功率显着降低，表明错误后大脑活动增加。与无冲突试验相比，Stroop 冲突试验后的α 功率也降低，表明冲突涉及心理调整过程。最后，试验间间隔期间的α 功率的半球差异支持左半球和右半球在行为激活和抑制中的互补作用。
