Hirschfeld Gerrit, Jansma Bernadette, Bölte Jens, Zwitserlood Pienie
University of Muenster, Germany.
Neuroreport. 2008 Aug 6;19(12):1227-30. doi: 10.1097/WNR.0b013e328309ecd1.
We report an event-related potential study investigating the neural basis of interference and facilitation in the picture-word interference paradigm with immediate overt naming. We used the high temporal resolution of the electrophysiological response to dissociate general and specific interference processes, by comparing unrelated word distractors to nonlinguistic (a row of Xs), surface feature denoting, and category member distractors. Our results first indicate that the increased naming latencies for linguistic relative to nonlinguistic distractors are because of general conflict-monitoring processes, associated with early event-related potential effects (120-220 ms) and increased activity in the anterior cingulate cortex. Next, distractors specifying a surface feature of the picture seem to facilitate its identification within the same time window, which involves widespread networks. Finally, nonlinguistic and surface feature distractors also reduced the N400 amplitude, relative to unrelated word distractors. Taken together our results support the view that several distinct processes give rise to the reaction time results often observed in picture naming.
我们报告了一项与事件相关电位的研究，该研究通过即时公开命名，在图-词干扰范式中探究干扰和促进作用的神经基础。我们利用电生理反应的高时间分辨率，通过比较无关词干扰项与非语言干扰项（一排X）、表面特征指示干扰项和类别成员干扰项，来区分一般和特定的干扰过程。我们的结果首先表明，相对于非语言干扰项，语言干扰项导致命名潜伏期增加是由于一般冲突监测过程，这与早期事件相关电位效应（120 - 220毫秒）以及前扣带回皮层活动增加有关。其次，指定图片表面特征的干扰项似乎在同一时间窗口内促进了对图片的识别，这涉及广泛的神经网络。最后，相对于无关词干扰项，非语言和表面特征干扰项也降低了N400波幅。综合来看，我们的结果支持这样一种观点，即几个不同的过程导致了在图片命名中经常观察到的反应时间结果。
