Di Russo Francesco, Bianco Valentina
Department of Movement, Human and Health Sciences, University of Rome "Foro Italico", 00135 Rome, Italy.
Santa Lucia Foundation IRCCS, 00179 Rome, Italy.
Brain Sci. 2023 Jun 22;13(7):982. doi: 10.3390/brainsci13070982.
The Stroop test represents a widely used task in basic and clinical research for approaching the cognitive system functioning in humans. However, a clear overview of the neurophysiological signatures associated with the different sub-domains of this task remains controversial. In the present study, we leveraged the EEG technique to explore the modulation of specific post-stimulus ERPs components during the Stroop test. Critically, to better disentangle the contribution of facilitation (i.e., faster color identification times for color-congruent Stroop words) and interference (i.e., longer color identification times for color-incongruent Stroop words) processes prompted by the Stroop test, we delivered congruent and incongruent trials in two separate experimental blocks, each including the respective neutral condition. Thanks to this methodological manipulation, we were able to clearly dissociate the two sub-processes. Electrophysiological results suggest specific markers of brain activity for the facilitation and the interference effects. Indeed, distinctive Stroop-related ERPs (i.e., the P3, the N450, and the LPC) were differently modulated in the two sub-processes. Collectively, we provide evidence of selected brain activities involved in the reactive stage of processing associated with the Stroop effect.
斯特鲁普测试是基础研究和临床研究中广泛用于探究人类认知系统功能的一项任务。然而，与该任务不同子领域相关的神经生理特征的清晰概述仍存在争议。在本研究中，我们利用脑电图技术来探索斯特鲁普测试期间特定刺激后事件相关电位（ERP）成分的调制。至关重要的是，为了更好地厘清斯特鲁普测试引发的促进（即颜色一致的斯特鲁普单词颜色识别时间更快）和干扰（即颜色不一致的斯特鲁普单词颜色识别时间更长）过程的贡献，我们在两个单独的实验块中分别进行了一致和不一致试验，每个实验块都包括各自的中性条件。由于这种方法上的操作，我们能够清楚地区分这两个子过程。电生理结果表明了促进和干扰效应的大脑活动的特定标志物。实际上，在这两个子过程中，与斯特鲁普相关的独特ERP（即P3、N450和晚期正成分）受到了不同的调制。总体而言，我们提供了与斯特鲁普效应相关的加工反应阶段所涉及的特定大脑活动的证据。
