Shao Zeshu, Roelofs Ardi, Acheson Daniel J, Meyer Antje S
Max Planck Institute for Psycholinguistics, PO Box 310, 6500 AH Nijmegen, The Netherlands.
Max Planck Institute for Psycholinguistics, PO Box 310, 6500 AH Nijmegen, The Netherlands; Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, The Netherlands.
Brain Res. 2014 Oct 24;1586:130-42. doi: 10.1016/j.brainres.2014.07.009. Epub 2014 Sep 16.
We investigated the neural basis of inhibitory control during lexical selection. Participants overtly named pictures while response times (RTs) and event-related brain potentials (ERPs) were recorded. The difficulty of lexical selection was manipulated by using object and action pictures with high name agreement (few response candidates) versus low name agreement (many response candidates). To assess the involvement of inhibition, we conducted delta plot analyses of naming RTs and examined the N2 component of the ERP. We found longer mean naming RTs and a larger N2 amplitude in the low relative to the high name agreement condition. For action naming we found a negative correlation between the slopes of the slowest delta segment and the difference in N2 amplitude between the low and high name agreement conditions. The converging behavioral and electrophysiological evidence suggests that selective inhibition is engaged to reduce competition during lexical selection in picture naming.
我们研究了词汇选择过程中抑制控制的神经基础。参与者在命名图片时，记录其反应时间（RTs）和事件相关脑电位（ERPs）。通过使用具有高名称一致性（反应候选少）与低名称一致性（反应候选多）的物体和动作图片来操纵词汇选择的难度。为了评估抑制的参与情况，我们对命名反应时间进行了增量图分析，并检查了ERP的N2成分。我们发现，与高名称一致性条件相比，低名称一致性条件下的平均命名反应时间更长，N2波幅更大。对于动作命名，我们发现最慢增量段的斜率与低名称一致性和高名称一致性条件之间的N2波幅差异呈负相关。行为和电生理证据的趋同表明，在图片命名的词汇选择过程中，选择性抑制被用于减少竞争。
