脑电图振荡反映了语音情感变化检测中的任务效应。
EEG oscillations reflect task effects for the change detection in vocal emotion.
作者信息
Chen Xuhai, Pan Zhihui, Wang Ping, Zhang Lijie, Yuan Jiajin
机构信息
Key Laboratory of Behavior and Cognitive Psychology in Shaanxi Province, School of Psychology, Shaanxi Normal University, 199# South Chang'an Road, Xi'an, 710062 China ; Key Laboratory of Modern Teaching Technology, Ministry of Education, Shaanxi Normal University, Xi'an, 710062 China.
Key Laboratory of Behavior and Cognitive Psychology in Shaanxi Province, School of Psychology, Shaanxi Normal University, 199# South Chang'an Road, Xi'an, 710062 China.
出版信息
Cogn Neurodyn. 2015 Jun;9(3):351-8. doi: 10.1007/s11571-014-9326-9. Epub 2014 Dec 19.
How task focus affects recognition of change in vocal emotion remains in debate. In this study, we investigated the role of task focus for change detection in emotional prosody by measuring changes in event-related electroencephalogram (EEG) power. EEG was recorded for prosodies with and without emotion change while subjects performed emotion change detection task (explicit) and visual probe detection task (implicit). We found that vocal emotion change induced theta event-related synchronization during 100-600 ms regardless of task focus. More importantly, vocal emotion change induced significant beta event-related desynchronization during 400-750 ms under explicit instead of implicit task condition. These findings suggest that the detection of emotional changes is independent of task focus, while the task focus effect in neural processing of vocal emotion change is specific to the integration of emotional deviations.
任务焦点如何影响对声音情绪变化的识别仍存在争议。在本研究中，我们通过测量事件相关脑电图（EEG）功率的变化，研究了任务焦点在情绪韵律变化检测中的作用。在受试者执行情绪变化检测任务（显性）和视觉探测任务（隐性）时，记录有无情绪变化的韵律的EEG。我们发现，无论任务焦点如何，声音情绪变化在100 - 600毫秒期间都会诱发θ事件相关同步。更重要的是，在显性而非隐性任务条件下，声音情绪变化在400 - 750毫秒期间诱发了显著的β事件相关去同步。这些发现表明，情绪变化的检测与任务焦点无关，而任务焦点在声音情绪变化神经处理中的作用特定于情绪偏差的整合。
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