Humboldt-University, Berlin, Germany.
J Cogn Neurosci. 2011 Jul;23(7):1567-86. doi: 10.1162/jocn.2010.21474. Epub 2010 Jun 1.
In this study, we investigated semantic context effects in language production with event-related brain potentials, extracted from the ongoing EEG recorded during overt speech production. We combined the picture-word interference paradigm and the semantic blocking paradigm to investigate the temporal dynamics and functional loci of semantic facilitation and interference effects. Objects were named in the context of semantically homogeneous blocks consisting of related objects and heterogeneous blocks consisting of unrelated objects. In each blocking condition, semantically related and unrelated distractor words were presented. Results show that classic patterns of semantically induced facilitation and interference effects in RTs can be directly related to ERP modulations located at temporal and frontal sites, starting at about 200 msec. Results also suggest that the processes associated with semantic facilitation and interference effects (i.e., conceptual and lexical processing) are highly interactive and coincide in time. Implications for the use of event-related brain potentials in speech production research and implications for current models of speech production are discussed.
在这项研究中，我们使用事件相关脑电位（EEG 记录期间的口语产生过程中提取）来研究语言产生中的语义语境效应。我们结合图片-词汇干扰范式和语义阻断范式，来研究语义促进和干扰效应的时间动态和功能定位。在语义一致的块（由相关对象组成）和语义不一致的块（由不相关对象组成）中，对物体进行命名。在每个阻断条件下，呈现语义相关和不相关的干扰词。结果表明，在 RT 中，经典的语义诱导促进和干扰效应模式可以直接与位于时间和额区的 ERP 调制相关，这些调制始于大约 200 毫秒。结果还表明，与语义促进和干扰效应相关的过程（即概念和词汇处理）是高度交互的，并且在时间上是重合的。讨论了事件相关脑电位在言语产生研究中的应用以及对当前言语产生模型的启示。
