感觉通道信息交互作用与知觉平均加工

项目名称： 感觉通道信息交互作用与知觉平均加工

项目编号： No.31200760

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 认知心理学

项目作者： 陈立翰

作者单位： 北京大学

项目金额： 22万元

中文摘要： 感觉通道信息交互作用是指大脑对外界刺激进行知觉加工时，不同感觉通道（如视觉、听觉和触觉）对各自接收到信息的感知存在相互影响。知觉平均加工的原意是指人的视觉系统能够迅速地抽取多个客体的平均物理属性（如空间大小），来完成相应的知觉决策任务。本项目首次考察跨感觉通道交互作用中知觉平均加工及其认知神经机制。研究拟考察以下三个方向的问题：（1）感觉通道信息交互中知觉平均加工的一般特性，包括：干扰通道刺激属性的统计学分布如何影响目标通道的信息加工？知觉平均是自动加工还是有意注意加工？知觉平均加工的时间进程与刺激的知觉组织和刺激对象数目有何对应关系？（2）知觉平均加工如何综合利用感觉通道信息交互的时间和空间信息？（3）知觉平均加工如何受感觉系统接收的刺激信号的不确定性（"内部噪声"）与人的先验知识变化（"外部噪声"）的共同调节？

中文关键词： 目标通道；干扰通道；多通道；交互；知觉平均

英文摘要： To achieve a comprehensive and coherent perception of the objects/events in the environment, we often need the engagement of multiple senses, in which one sensory modality (distractor modality) would impose influence over the other modality (target modality) in processing sensory information. Perceptual averaging has been initially revealed in visual system which can quickly extract the summary statistics for given features (such as the mean size) of multiple objects. We here firstly extend the scope of perceptual averaging and investigate the cognitive-neural mechanisms of perceptual averaging in crossmodal interactions. Specifically, we aim to answer the following questions: (1) The general features of perceptual averaging in multisensory interactions, such as how different statistical distributions (including mean and variance) of sensory features in a distractor modality affect the information processing in target modality? Whether perceptual averaging is subject to the attentional load and whether the processing is automatic or requires attentional engagement? What is the relation between the time course of perceptual averaging and the perceptual organization and the numbers of stimuli in question ? (2) In crossmodal interaction, when the spatial information unfolds along the time, is the perceptual averagi

英文关键词： target modality；distractor modality；multisensory；interaction；perceptual averaging