Magyari Lilla, Bastiaansen Marcel C M, de Ruiter Jan P, Levinson Stephen C
Max Planck Institute for Psycholinguistics.
J Cogn Neurosci. 2014 Nov;26(11):2530-9. doi: 10.1162/jocn_a_00673. Epub 2014 Jun 4.
RTs in conversation, with average gaps of 200 msec and often less, beat standard RTs, despite the complexity of response and the lag in speech production (600 msec or more). This can only be achieved by anticipation of timing and content of turns in conversation, about which little is known. Using EEG and an experimental task with conversational stimuli, we show that estimation of turn durations are based on anticipating the way the turn would be completed. We found a neuronal correlate of turn-end anticipation localized in ACC and inferior parietal lobule, namely a beta-frequency desynchronization as early as 1250 msec, before the end of the turn. We suggest that anticipation of the other's utterance leads to accurately timed transitions in everyday conversations.
在对话中，反应时平均间隔为200毫秒，且常常更短，尽管反应复杂且言语产生存在延迟（600毫秒或更长），但仍快于标准反应时。这只能通过预测对话中轮流发言的时间和内容来实现，而对此人们知之甚少。利用脑电图和带有对话刺激的实验任务，我们表明对轮流发言时长的估计是基于预测轮流发言将如何结束。我们发现，在轮流发言结束前1250毫秒，就有一个位于前扣带回和顶下小叶的与预测轮流发言结束相关的神经关联，即β频率去同步化。我们认为，对他人话语的预测会导致日常对话中准确计时的转换。
