Event-Related Potentials of Visual Working Memory: Exploring Capacity Limit’s Relation with Maintenance and Proactive Interference

Bibliographic Details
Main Author:	Zhou, Li
Language:	English
Published:	Miami University / OhioLINK 2015
Subjects:	Cognitive Psychology Visual working memory ERP Hemispheric asymmetry Proactive interference LPC P3
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=miami1429790082

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spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-miami14297900822021-08-03T06:30:45Z Event-Related Potentials of Visual Working Memory: Exploring Capacity Limit’s Relation with Maintenance and Proactive Interference Zhou, Li Cognitive Psychology Visual working memory ERP Hemispheric asymmetry Proactive interference LPC P3 Visual working memory (VWM) refers to the ability to actively maintain and use visual information for an ongoing process. It is a central component of many human abilities, and its limit in capacity constrains human performance across many tasks. VWM capacity is determined by actively maintaining and successfully retrieving information. Though many researchers have reached an agreement that VWM capacity is limited to 3 to 4 items, the neural mechanisms that account for this limit are still not well understood. In this dissertation, the ERP activities related to VWM maintaining process and retrieval process were investigated. Recently, an ERP study reported that the contralateral delay activity (CDA) was the ERP index of the number of items maintained in VWM. However, the assumption of hemispheric symmetry behind the study design is contradicted to those hemispheric asymmetry studies. Therefore, experiment 1 replicated the study about CDA to investigate the hemispheric symmetry issue particularly. Both the behavioral and ERP results indicated that there was hemispheric asymmetry during maintaining process and left hemisphere was more actively involved. Because of the hemispheric asymmetry during the maintaining process, experiment 2 was conducted to unveil the behavior of traditional P3 component in the standard change detection task. P3 derived from the maintaining process was sensitive to memory load as CDA was, and its amplitude was able to predict individual difference in VWM capacity estimated by Rouder et al.’s model. Besides the maintaining process, we also investigated the resolving of proactive interference (PI) during the retrieval process in experiment 3. Late positive component (LPC) was associated with resolving PI in the recent-probe design of the change detection task. The amplitude difference between recent and non-recent negative probe was negatively related to VWM capacity estimated from behavioral data. In summary, the P3 in the maintaining process and LPC of resolving PI during the retrieval can be used to predict individuals’ VWM capacity. 2015-04-23 English text Miami University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=miami1429790082 http://rave.ohiolink.edu/etdc/view?acc_num=miami1429790082 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection	NDLTD
language	English
sources	NDLTD
topic	Cognitive Psychology Visual working memory ERP Hemispheric asymmetry Proactive interference LPC P3
spellingShingle	Cognitive Psychology Visual working memory ERP Hemispheric asymmetry Proactive interference LPC P3 Zhou, Li Event-Related Potentials of Visual Working Memory: Exploring Capacity Limit’s Relation with Maintenance and Proactive Interference
author	Zhou, Li
author_facet	Zhou, Li
author_sort	Zhou, Li
title	Event-Related Potentials of Visual Working Memory: Exploring Capacity Limit’s Relation with Maintenance and Proactive Interference
title_short	Event-Related Potentials of Visual Working Memory: Exploring Capacity Limit’s Relation with Maintenance and Proactive Interference
title_full	Event-Related Potentials of Visual Working Memory: Exploring Capacity Limit’s Relation with Maintenance and Proactive Interference
title_fullStr	Event-Related Potentials of Visual Working Memory: Exploring Capacity Limit’s Relation with Maintenance and Proactive Interference
title_full_unstemmed	Event-Related Potentials of Visual Working Memory: Exploring Capacity Limit’s Relation with Maintenance and Proactive Interference
title_sort	event-related potentials of visual working memory: exploring capacity limit’s relation with maintenance and proactive interference
publisher	Miami University / OhioLINK
publishDate	2015
url	http://rave.ohiolink.edu/etdc/view?acc_num=miami1429790082
work_keys_str_mv	AT zhouli eventrelatedpotentialsofvisualworkingmemoryexploringcapacitylimitsrelationwithmaintenanceandproactiveinterference
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Event-Related Potentials of Visual Working Memory: Exploring Capacity Limit’s Relation with Maintenance and Proactive Interference

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