重读对口语加工中“时间选择性注意”的调控及其认知神经基础

项目名称： 重读对口语加工中“时间选择性注意”的调控及其认知神经基础

项目编号： No.31271091

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 医药、卫生

项目作者： 李晓庆

作者单位： 中国科学院心理研究所

项目金额： 75万元

中文摘要： 口语是在时间维度上迅速展开的，"时间选择性注意"在口语理解中发挥着重要作用。重读是标记句中不同成分之间相对凸显关系的韵律信息，可调控口语加工中的注意分配。但是，已有研究仅仅考察了语流中单个时间点上的注意分配，不能反应重读调控"时间选择性注意"的本质特点，也没有揭示其认知神经基础。本项目将借助脑电技术，把事件相关电位分析和时频分析相结合，系统考察重读对口语加工中"时间选择性注意"的调控：1)从促进和抑制两个侧面，探索重读调控"时间选择性注意"的动态时间特点；2)从"预期"和"对脑电节律振荡的调控"的角度深入分析重读调控"时间选择性注意"的认知机制和神经基础；3)考察重读的注意调控作用对进一步语义加工的影响。这将有助于进一步揭示口语理解中韵律信息的作用机制。同时，此研究项目也会促进对"时间选择性注意"等一般认知过程的认识。最后，此项目还可为言语加工障碍群体的侦查和治疗提供理论指导。

中文关键词： 口语理解；重读；时间选择性注意；脑电；

英文摘要： As speech unfolds rapidly in time, selective temporal attention plays an important role during spoken language comprehension. Previous studies revealed that accentuation, as a prosodic cue to mark the relative prominence of the different words in sentence, can also modulate attention allocation in speech processing. However, previous studies considered the linguistic information at every time point as isolated information. What remained unknown is how and when accentuation guides selective temporal attention in continuous speech, as well as what's the cognitive and neural mechanisms underlying the modulation. With the help of ERP (event-related potential) and time-frequency analysis of EEG (electroencephalogram), this research project aims to 1) investigate how accentuation facilitates and inhibits selective temporal attention in the continuous speech and their time characteristics; 2) to explore the cognitive and neural mechanisms of those accentuation effects from the perspectives of 'prediction' and 'on-going brain oscillations modulation'; and 3) to examine how the attention modulated by accentuation influences semantic processing. The results of this research project will help to further reveal how and why prosodic information influences spoken language comprehension so that we can achieve a more comprehens

英文关键词： Spoken language comprehension；accentuation；selective temporal attention；EEG；