MRC Cognition and Brain Sciences Unit, University of Cambridge, UK; Department of Language Studies, University of Toronto Scarborough, Canada; Department of Psychology, University of Toronto Scarborough, Canada.
MRC Cognition and Brain Sciences Unit, University of Cambridge, UK.
Cognition. 2022 Jul;224:105051. doi: 10.1016/j.cognition.2022.105051. Epub 2022 Feb 24.
This study investigates the dynamics of speech envelope tracking during speech production, listening and self-listening. We use a paradigm in which participants listen to natural speech (Listening), produce natural speech (Speech Production), and listen to the playback of their own speech (Self-Listening), all while their neural activity is recorded with EEG. After time-locking EEG data collection and auditory recording and playback, we used a Gaussian copula mutual information measure to estimate the relationship between information content in the EEG and auditory signals. In the 2-10 Hz frequency range, we identified different latencies for maximal speech envelope tracking during speech production and speech perception. Maximal speech tracking takes place approximately 110 ms after auditory presentation during perception and 25 ms before vocalisation during speech production. These results describe a specific timeline for speech tracking in speakers and listeners in line with the idea of a speech chain and hence, delays in communication.
这项研究调查了言语产生、聆听和自我聆听过程中言语包络追踪的动态。我们使用了一种范式，参与者在该范式中聆听自然言语（聆听）、产生自然言语（言语产生）以及聆听自己言语的回放（自我聆听），同时使用 EEG 记录他们的神经活动。在进行 EEG 数据采集和听觉记录与回放后，我们使用高斯 Copula 互信息测度来估计 EEG 和听觉信号中的信息含量之间的关系。在 2-10 Hz 的频率范围内，我们确定了在言语产生和言语感知过程中最大言语包络追踪的不同潜伏期。在感知过程中，最大的言语追踪发生在听觉呈现后约 110 毫秒，而在言语产生过程中，最大的言语追踪发生在发声前 25 毫秒。这些结果描述了说话者和聆听者在言语追踪方面的特定时间线，与言语链的概念一致，因此也与沟通延迟有关。
