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dc.contributor.authorChennu, Srivas
dc.contributor.authorCraston, Patrick
dc.contributor.authorWyble, Brad
dc.contributor.authorBowman, Howard
dc.date.accessioned2011-07-15T20:56:59Z
dc.date.available2011-07-15T20:56:59Z
dc.date.issued2009-11
dc.date.submitted2009-07
dc.identifier.issn1553-7358
dc.identifier.issn1553-734X
dc.identifier.urihttp://hdl.handle.net/1721.1/64824
dc.description.abstractWhat role does attention play in ensuring the temporal precision of visual perception? Behavioural studies have investigated feature selection and binding in time using fleeting sequences of stimuli in the Rapid Serial Visual Presentation (RSVP) paradigm, and found that temporal accuracy is reduced when attentional control is diminished. To reduce the efficacy of attentional deployment, these studies have employed the Attentional Blink (AB) phenomenon. In this article, we use electroencephalography (EEG) to directly investigate the temporal dynamics of conscious perception. Specifically, employing a combination of experimental analysis and neural network modelling, we test the hypothesis that the availability of attention reduces temporal jitter in the latency between a target's visual onset and its consolidation into working memory. We perform time-frequency analysis on data from an AB study to compare the EEG trials underlying the P3 ERPs (Event-related Potential) evoked by targets seen outside vs. inside the AB time window. We find visual differences in phase-sorted ERPimages and statistical differences in the variance of the P3 phase distributions. These results argue for increased variation in the latency of conscious perception during the AB. This experimental analysis is complemented by a theoretical exploration of temporal attention and target processing. Using activation traces from the Neural-ST2 [Neural - ST superscript 2] model, we generate virtual ERPs and virtual ERPimages. These are compared to their human counterparts to propose an explanation of how target consolidation in the context of the AB influences the temporal variability of selective attention. The AB provides us with a suitable phenomenon with which to investigate the interplay between attention and perception. The combination of experimental and theoretical elucidation in this article contributes to converging evidence for the notion that the AB reflects a reduction in the temporal acuity of selective attention and the timeliness of perception.en_US
dc.description.sponsorshipEngineering and Physical Sciences Research Council (Grant GR/S15075/01)en_US
dc.description.sponsorshipResearch Councils UK (Academic Fellowship grant EP/C509218/1)en_US
dc.description.sponsorshipNational Institute of Mental Health (U.S.) (Grant NIMH MH47432)en_US
dc.language.isoen_US
dc.publisherPublic Library of Scienceen_US
dc.relation.isversionofhttp://dx.doi.org/10.1371/journal.pcbi.1000576en_US
dc.rightsCreative Commons Attributionen_US
dc.rights.urihttp://creativecommons.org/licenses/by/2.5/en_US
dc.sourcePLoSen_US
dc.titleAttention Increases the Temporal Precision of Conscious Perception: Verifying the Neural-ST2 Modelen_US
dc.title.alternativeAttention Increases the Temporal Precision of Conscious Perception: Verifying the [Neural- ST superscript 2]Modelen_US
dc.typeArticleen_US
dc.identifier.citationChennu, Srivas et al. “Attention Increases the Temporal Precision of Conscious Perception: Verifying the Neural-ST2 Model.” Ed. Karl J. Friston. PLoS Computational Biology 5.11 (2009) : e1000576. © 2009 Chennu et al.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Brain and Cognitive Sciencesen_US
dc.contributor.approverWyble, Brad
dc.contributor.mitauthorWyble, Brad
dc.relation.journalPLOS computational biologyen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsChennu, Srivas; Craston, Patrick; Wyble, Brad; Bowman, Howarden
mit.licensePUBLISHER_CCen_US


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