Jansen Stefanie, Wesselmeier Hendrik, de Ruiter Jan P, Mueller Horst M
Experimental Neurolinguistics Group, Faculty of Linguistics and Literary Studies, Bielefeld University, Bielefeld, Germany; Collaborative Research Centre "Alignment in Communication" (SFB 673), Bielefeld University, Bielefeld, Germany.
Experimental Neurolinguistics Group, Faculty of Linguistics and Literary Studies, Bielefeld University, Bielefeld, Germany; Collaborative Research Centre "Alignment in Communication" (SFB 673), Bielefeld University, Bielefeld, Germany.
J Neurosci Methods. 2014 Jul 30;232:24-9. doi: 10.1016/j.jneumeth.2014.04.030. Epub 2014 May 6.
Even though research in turn-taking in spoken dialogues is now abundant, a typical EEG-signature associated with the anticipation of turn-ends has not yet been identified until now.
The purpose of this study was to examine if readiness potentials (RP) can be used to study the anticipation of turn-ends by using it in a motoric finger movement and articulatory movement task. The goal was to determine the preconscious onset of turn-end anticipation in early, preconscious turn-end anticipation processes by the simultaneous registration of EEG measures (RP) and behavioural measures (anticipation timing accuracy, ATA). For our behavioural measures, we used both button-press and verbal response ("yes"). In the experiment, 30 subjects were asked to listen to auditorily presented utterances and press a button or utter a brief verbal response when they expected the end of the turn. During the task, a 32-channel-EEG signal was recorded.
The results showed that the RPs during verbal- and button-press-responses developed similarly and had an almost identical time course: the RP signals started to develop 1170 vs. 1190 ms before the behavioural responses.
Until now, turn-end anticipation is usually studied using behavioural methods, for instance by measuring the anticipation timing accuracy, which is a measurement that reflects conscious behavioural processes and is insensitive to preconscious anticipation processes.
The similar time course of the recorded RP signals for both verbal- and button-press responses provide evidence for the validity of using RPs as an online marker for response preparation in turn-taking and spoken dialogue research.
尽管目前关于口语对话中话轮转换的研究已经很多，但迄今为止，尚未发现与话轮结束预期相关的典型脑电图特征。
本研究的目的是通过在手指运动和发音运动任务中使用准备电位（RP），来检验其是否可用于研究话轮结束预期。目标是通过同时记录脑电图测量值（RP）和行为测量值（预期时间准确性，ATA），确定早期前意识话轮结束预期过程中话轮结束预期的前意识起始点。对于我们的行为测量，我们同时使用了按键和言语反应（“是”）。在实验中，30名受试者被要求听听觉呈现的话语，并在预期话轮结束时按下按钮或做出简短的言语反应。在任务过程中，记录了32通道的脑电图信号。
结果表明，言语反应和按键反应期间的准备电位发展相似，且时间进程几乎相同：准备电位信号在行为反应前1170毫秒和1190毫秒开始发展。
到目前为止，话轮结束预期通常使用行为方法进行研究，例如通过测量预期时间准确性，这是一种反映有意识行为过程且对前意识预期过程不敏感的测量方法。
言语反应和按键反应记录的准备电位信号相似的时间进程，为在话轮转换和口语对话研究中使用准备电位作为反应准备的在线标记的有效性提供了证据。
