Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, The Netherlands; International Max Planck Research School for Language Sciences, Max Planck Institute for Psycholinguistics, Nijmegen, The Netherlands.
Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, The Netherlands.
Neuropsychologia. 2017 Nov;106:138-145. doi: 10.1016/j.neuropsychologia.2017.09.024. Epub 2017 Sep 27.
Allocation and use of central processing capacity have been associated with the P3 event-related brain potential amplitude in a large variety of non-linguistic tasks. However, little is known about the P3 in spoken language production. Moreover, the few studies that are available report opposing P3 effects when task complexity is manipulated. We investigated allocation and use of central processing capacity in a spoken phrase production task: Participants switched every second trial between describing pictures using noun phrases with one adjective (size only; simple condition, e.g., "the big desk") or two adjectives (size and color; complex condition, e.g., "the big red desk"). Capacity allocation was manipulated by complexity, and capacity use by switching. Response time (RT) was longer for complex than for simple trials. Moreover, complexity and switching interacted: RTs were longer on switch than on repeat trials for simple phrases but shorter on switch than on repeat trials for complex phrases. P3 amplitude increased with complexity. Moreover, complexity and switching interacted: The complexity effect was larger on the switch trials than on the repeat trials. These results provide evidence that the allocation and use of central processing capacity in language production are differentially reflected in the P3 amplitude.
在各种非语言任务中，中央处理能力的分配和使用与 P3 事件相关脑电位幅度有关。然而，关于口语产生中的 P3 知之甚少。此外，现有的少数研究报告了当任务复杂性被操纵时，P3 效应相反。我们在一个口语短语产生任务中研究了中央处理能力的分配和使用：参与者在每两秒钟的试验中切换，使用一个形容词（仅大小；简单条件，例如“大桌子”）或两个形容词（大小和颜色；复杂条件，例如“大红桌子”）来描述图片。通过复杂性来操纵能力分配，通过切换来操纵能力使用。与简单试验相比，复杂试验的反应时间（RT）更长。此外，复杂性和切换相互作用：对于简单短语，在切换试验上的 RT 比在重复试验上的 RT 更长，但对于复杂短语，在切换试验上的 RT 比在重复试验上的 RT 更短。P3 振幅随复杂性增加。此外，复杂性和切换相互作用：在切换试验上的复杂性效应比在重复试验上的更大。这些结果提供了证据，表明语言产生中的中央处理能力的分配和使用在 P3 振幅中得到了不同的反映。
