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Conference Paper: High and low: the resolution of representations in visual working memory

TitleHigh and low: the resolution of representations in visual working memory
Authors
Issue Date2013
PublisherAssociation for Research in Vision and Ophthalmology. The Journal's web site is located at http://wwwjournalofvisionorg/
Citation
The 13th Annual Meeting of the Vision Sciences Society (VSS 2013), Naples, FL., 10-15 May 2013. In Journal of Vision, 2013, v. 13 n. 9, article 1358 How to Cite?
AbstractVisual working memory (VWM) has long been considered to be limited in capacity, but the way in which it is limited remains unclear. Despite differences in predictions of the number of objects that can be stored, both the slot and resource models agree that resolution in VWM declines as the number of objects increases. Here we investigate the relationship between the resolution of items and the number of items in VWM by separating different types of resolution measures. In this study, we adapted the paradigm of Awh, Barton, and Vogel (2007) to provide separate measures for low-resolution (i.e., categorical judgment) and high-resolution (i.e., within-category fine discrimination) representations of an item in memory. Participants were asked to remember a mixture of objects from two categories, varying in set size and display time. After a 1s retention interval, the location of one item was highlighted and participants were first tested on the category of this item-to-report. The nature of the second response was contingent on the first: depending on which category response was made, participants either adjusted a color wheel or selected a cube from an array (Experiment 1), or reported the color or orientation of gabor patches (Experiment 2). In both experiments, precision of high-resolution representations declined monotonically until the set size reached four items, fitting to the predictions from the standard mixture model of Zhang and Luck (2008). In contrast, we observed that the accuracy for low-resolution representations remained very high and did not decrease with set size, which is not consistent with either model. We propose that the inverse relationship between the number and resolution of representations in VWM is perhaps not the only possible relationship: different types of resolution representation exist in VWM, and people can maintain both high- and low-resolution representations of an object.
DescriptionPoster Session - Visual memory: Precision, capacity: no. 63.452
Open Access Journal
Persistent Identifierhttp://hdl.handle.net/10722/187050
ISSN
2015 Impact Factor: 2.341
2015 SCImago Journal Rankings: 1.042

 

DC FieldValueLanguage
dc.contributor.authorLiu, TTen_US
dc.contributor.authorChen, Zen_US
dc.contributor.authorHayward, WGen_US
dc.date.accessioned2013-08-20T12:28:43Z-
dc.date.available2013-08-20T12:28:43Z-
dc.date.issued2013en_US
dc.identifier.citationThe 13th Annual Meeting of the Vision Sciences Society (VSS 2013), Naples, FL., 10-15 May 2013. In Journal of Vision, 2013, v. 13 n. 9, article 1358en_US
dc.identifier.issn1534-7362-
dc.identifier.urihttp://hdl.handle.net/10722/187050-
dc.descriptionPoster Session - Visual memory: Precision, capacity: no. 63.452-
dc.descriptionOpen Access Journal-
dc.description.abstractVisual working memory (VWM) has long been considered to be limited in capacity, but the way in which it is limited remains unclear. Despite differences in predictions of the number of objects that can be stored, both the slot and resource models agree that resolution in VWM declines as the number of objects increases. Here we investigate the relationship between the resolution of items and the number of items in VWM by separating different types of resolution measures. In this study, we adapted the paradigm of Awh, Barton, and Vogel (2007) to provide separate measures for low-resolution (i.e., categorical judgment) and high-resolution (i.e., within-category fine discrimination) representations of an item in memory. Participants were asked to remember a mixture of objects from two categories, varying in set size and display time. After a 1s retention interval, the location of one item was highlighted and participants were first tested on the category of this item-to-report. The nature of the second response was contingent on the first: depending on which category response was made, participants either adjusted a color wheel or selected a cube from an array (Experiment 1), or reported the color or orientation of gabor patches (Experiment 2). In both experiments, precision of high-resolution representations declined monotonically until the set size reached four items, fitting to the predictions from the standard mixture model of Zhang and Luck (2008). In contrast, we observed that the accuracy for low-resolution representations remained very high and did not decrease with set size, which is not consistent with either model. We propose that the inverse relationship between the number and resolution of representations in VWM is perhaps not the only possible relationship: different types of resolution representation exist in VWM, and people can maintain both high- and low-resolution representations of an object.-
dc.languageengen_US
dc.publisherAssociation for Research in Vision and Ophthalmology. The Journal's web site is located at http://wwwjournalofvisionorg/-
dc.relation.ispartofJournal of Visionen_US
dc.titleHigh and low: the resolution of representations in visual working memoryen_US
dc.typeConference_Paperen_US
dc.identifier.emailHayward, WG: whayward@hkucc.hku.hken_US
dc.identifier.authorityHayward, WG=rp00630en_US
dc.description.naturelink_to_OA_fulltext-
dc.identifier.doi10.1167/13.9.1358-
dc.identifier.hkuros217085en_US
dc.identifier.volume13en_US
dc.identifier.issue9-
dc.publisher.placeUnited States-
dc.customcontrol.immutablesml 131003-

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