任务维度和任务无关维度干扰信息的同质性影响视觉搜索的神经机制  

The Brain Mechanisms for Processing Heterogeneous Distracting Information Along Task-Relevant and -Irrelevant Dimensions in Visual Search

作　　者：魏萍[1,2] 周晓林[2] 

机构地区：[1]首都师范大学心理系,北京市“学习与认知”重点实验室,北京100048 [2]北京大学心理学系,北京100871

出　　处：《心理科学进展》2011年第6期794-802,共9页Advances in Psychological Science

基　　金：国家自然科学基金(30770712,31000502);国家基础研究项目(973项目:2010CB833904)

摘　　要：在三个实验中,我们利用功能性磁共振成像(functional magnetic resonance imaging,fMRI)技术考察了在简单特征搜索任务和客体内联合搜索任务中任务维度干扰项的同质性(或称一致性,homogeneity)和任务无关维度干扰信息的同质性对视觉搜索行为的影响及其神经机制。主要探讨了三个问题:(1)任务维度干扰信息的同质性与目标存在性之间交互作用的神经机制;(2)任务维度干扰信息的同质性与任务无关维度干扰信息的同质性之间的交互作用及其神经机制;(3)上述神经机制在不同类型的视觉搜索(特征搜索和联合搜索)中的异同。Three functional magnetic resonance imaging （fMRI） experiments were conducted to investigate three issues regarding the impacts of heterogeneity along the task-relevant and the task-irrelevant dimensions upon the efficiency in visual search. The first concerns the neural basis of the interaction between target-presence and the homogeneity along the task-relevant dimension. The second is about the behavioral consequences and the neural correlates of processing heterogeneous distracting information along task-relevant and –irrelevant dimensions. The third is about the common and specific brain mechanisms underlying the interactions between target-presence and the homogeneity along task-relevant and -irrelevant dimensions in feature search vs. conjunction search.

关 键 词：特征搜索 联合搜索 选择性注意 任务维度 任务无关维度 功能磁共振成像 

分 类 号：B842[哲学宗教—基础心理学]