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Internal but not external noise frees working memory resources.

cam.issuedOnline2018-10-15
dc.contributor.authorTomić, Ivan
dc.contributor.authorBays, Paul M
dc.contributor.orcidTomić, Ivan [0000-0001-6046-9642]
dc.contributor.orcidBays, Paul M [0000-0003-4684-4893]
dc.date.accessioned2018-12-01T00:31:10Z
dc.date.available2018-12-01T00:31:10Z
dc.date.issued2018-10
dc.description.abstractThe precision with which visual information can be recalled from working memory declines as the number of items in memory increases. This finding has been explained in terms of the distribution of a limited representational resource between items. Here we investigated how the sensory strength of memoranda affects resource allocation. We manipulated signal strength of an orientation stimulus in two ways: we varied the internal (sensory) noise by adjusting stimulus contrast, and varied the external (stimulus) noise by altering the within-stimulus variability. Both manipulations had similar effects on the precision with which the orientation could be recalled, but differed in their impact on memory for other stimuli. These results indicate that increasing internal noise released resources that could be used to store other stimuli more precisely; increasing external noise had no such effect. We show that these observations can be captured by a simple neural model of working memory encoding, in which spiking activity takes on the role of the limited resource.
dc.format.mediumElectronic-eCollection
dc.identifier.doi10.17863/CAM.33524
dc.identifier.eissn1553-7358
dc.identifier.issn1553-734X
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/286213
dc.languageeng
dc.language.isoeng
dc.publisherPublic Library of Science (PLoS)
dc.publisher.urlhttp://dx.doi.org/10.1371/journal.pcbi.1006488
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectAdolescent
dc.subjectAdult
dc.subjectComputational Biology
dc.subjectFemale
dc.subjectHumans
dc.subjectMale
dc.subjectMemory, Short-Term
dc.subjectModels, Neurological
dc.subjectNoise
dc.subjectReproducibility of Results
dc.subjectYoung Adult
dc.titleInternal but not external noise frees working memory resources.
dc.typeArticle
dcterms.dateAccepted2018-09-05
prism.issueIdentifier10
prism.publicationDate2018
prism.publicationNamePLoS Comput Biol
prism.startingPagee1006488
prism.volume14
pubs.funder-project-idWellcome Trust (106926/Z/15/Z)
rioxxterms.licenseref.startdate2018-10-15
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.typeJournal Article/Review
rioxxterms.versionVoR
rioxxterms.versionofrecord10.1371/journal.pcbi.1006488

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