Selectively Maintaining Object Features within Visual Working Memory: An ERP Study
Xiaowei Ding; Kaifeng He; Zaifeng Gao; a, Mowei Shen
2017-07
会议名称2017年第二届曲阜视觉科学会议
会议日期2017.7.2
会议地点曲阜
摘要

PURPOSE: The manipulation of visual working memory (VWM) has received increasing interest, by focusing on the underlying mechanisms of manipulation for objects presented at distinct locations. However, no study has explored the manipulation mechanisms for the content of a stored multi-featured object (e.g., retaining color while discarding polygon for a colored-polygon). The current study examined whether participants can selectively retain task-relevant information of a dual-featured object after a retro-cue was presented at the maintenance interval. We hypothesized that the processing nature of a feature at the perceptual stage affected its manipulation in VWM, and tested this hypothesis by adopting two types of dual-featured objects. One is objects composed of highly-discriminable features (colored-oriented-bars) which can be processed via spread attention; the other type is objects containing fine-grained information (colored-polygons) which is processed via focal attention. We predicted that selective maintenance could not occur for the former type but occurred for the latter.
METHODS: Contralateral delay activity (CDA) was adopted as a neural marker during a change detection task, in which two features of an object was initnally memorized. During the maintenance phase, we presented a retro-cue to inform participants to selectively retain color, polygon/orientation, or both.
RESULTS: In line with our prediction, CDA amplitude was significantly lower for retain-color and retain-polygon conditions than for retain-both when colored-polygons were presented as stimuli; however, there was no significant difference between retain-color, retain-orientation, and retain-both conditions when colored-oriented-bars were used as stimuli (Experiment 1). Moreover, the findings cannot be explained by operations over independent objects (Experiment 2).
CONCLUSIONS:we found that the selective maintenance manipulation was modulated by the nature of the constituent elements. In particular, for dual-featured representations containing fine-grained information which needs to be processed via focal attention, the constituent single features can be selectively retained according to the task requirement (e.g., colored polygon). In contrast, for dual-featured representations composed of highly-discriminable information which is processed via spread attention, the stable unit could not be broken to selectively maintain the individual elements (e.g., colored bar).

关键词Visual working memory manipulation retro-cue highly-discriminable feature fine-grained information
语种英语
文献类型会议论文
条目标识符http://ir.psych.ac.cn/handle/311026/22115
专题心理所主办学术会议_2017年第二届曲阜视觉科学会议_会议摘要
作者单位Department of Psychology and Behavioral Sciences, Zhejiang University
推荐引用方式
GB/T 7714
Xiaowei Ding,Kaifeng He,Zaifeng Gao,et al. Selectively Maintaining Object Features within Visual Working Memory: An ERP Study[C],2017.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Xiaowei Ding]的文章
[Kaifeng He]的文章
[Zaifeng Gao]的文章
百度学术
百度学术中相似的文章
[Xiaowei Ding]的文章
[Kaifeng He]的文章
[Zaifeng Gao]的文章
必应学术
必应学术中相似的文章
[Xiaowei Ding]的文章
[Kaifeng He]的文章
[Zaifeng Gao]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。