Dpto de Psicología Cognitiva, Social y Organizacional, Facultad de PsicologíaUniversidad de La Laguna, Tenerife, Spain.
Neuroimage. 2011 Aug 1;57(3):1243-50. doi: 10.1016/j.neuroimage.2011.05.015. Epub 2011 May 12.
Recent language production studies have started to use electrophysiological measures to investigate the time course of word selection processes. An important contribution with respect to this issue comes from studies that have relied on an effect of semantic context in the semantic blocking task. Here we used this task to further establish the empirical pattern associated with the effect of semantic context, and whether the effect arises during output processing. Electrophysiological and reaction time measures were co-registered while participants overtly named picture and word stimuli in the semantic blocking task. The results revealed inhibitory reaction time effects of semantic context for both words and pictures, and a corresponding electrophysiological effect that could not be interpreted in terms of output processes. These data suggest that the electrophysiological effect of semantic context in the semantic blocking task does not reflect output processes, and therefore undermine an interpretation of this effect in terms of word selection.
近期的语言产出研究开始使用电生理测量来探究词汇选择过程的时间进程。语义阻断任务中语义语境的作用的相关研究为此问题做出了重要贡献。在这里，我们使用这一任务进一步确定了与语义语境作用相关的经验模式，以及该作用是否在输出处理过程中产生。在参与者在语义阻断任务中出声命名图片和单词刺激的同时，对电生理和反应时间测量进行了联合记录。结果表明，语义语境对单词和图片都产生了抑制性的反应时间效应，以及一种不能根据输出过程来解释的相应的电生理效应。这些数据表明，语义阻断任务中语义语境的电生理效应并不反映输出过程，因此，否定了该效应是词汇选择的一种解释。
