客体表征在视觉工作记忆中构建.pdf

浙江人学博十学位论文客体表征n!,、“水桶”,其所存储内容(即客体表征)类似水桶中所盛的“水”或“冰”.视觉工作记忆的运行机制应同其在视知觉中的功能作用相适应,,本论文从视觉工作记忆的功能出发,,,知觉不同阶段加工的信患,,采用行为实验与记录事件相关电位的方法,,分别考察基本特征(实验1),细节特征(实验2),以及由同种特征构成的基本特征与细节特征(实验3)作为无关维度时,是否可被自动选择、,以指示工作记忆中已存储表征与知觉输入信息间冲突的N270为指标,分别考察基本特征(实验4),细节特征(实验5),以及由同种特征构成的基本特征与细节特征(实验6)作为无关维度时,其变化是否可诱发N270,,以指示视觉工作记忆中信息存储的CDA幅值为指标,通过操纵记忆材料类型(实验7)、任务要求(实验S)、客体加工时闻(实验9),:(1)知觉不同阶段加工与提取的视觉信息,在视觉工作记忆中存在分离的表征机制:视觉基本特征首先自动选择进入视觉工作记忆,并被表征存储为整合客体;随后,,后者的存储受自上而下的任务调节.(2)客体在视觉工作记忆中的构建过程以累积方式进行,:视觉工作记忆,视知觉,客体,注意,并行加工,系列加工IV浙江人学博十学位论文客体表征柏:税觉--id忆中的构建Ab stractVisual working memo巧(VWM)maintains and manipulates a limited set of visual is one of the most ponents in human beings’visual ,a large quantity of work has been done onexploring the capacity of VWM,as well asthe object storage fashion in opacity of VWM is like a‘bucket’,and the o场ect他prentatio神stored in VWqVI is like the‘water’or the‘ice’in a operatingmechanism of VWM should fit its function in visual perception,and the content it maintaimdepends on the interaction between visual perception and ,based upon thefunction ofVWM,here we focused on how these object representations are constructed in hypothesized that how visual information is extracted during visual perception can directlyinfluence how the information will be selected and retained in to thishypothesis,there are two dissociated mechanisms in VWM for selecting and storing informationextracted at different stages of visual perception(parallel or serial processing).Here We testedt