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dc.contributor.authorDanilova, MVen
dc.contributor.authorTakahashi, Cen
dc.contributor.authorMollon, Johnen
dc.date.accessioned2020-04-21T23:30:34Z
dc.date.available2020-04-21T23:30:34Z
dc.date.issued2020-01en
dc.identifier.issn1932-6203
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/304596
dc.description.abstractWe measured psychophysical thresholds for discriminating the speeds of two arrays of moving dots. The arrays could be juxtaposed or could be spatially separated by up to 10 degrees of visual angle, eccentricity being held constant. We found that the precision of the judgments varied little with separation. Moreover, the function relating threshold to separation was similar whether the arrays moved in the same, in opposite or in orthogonal directions. And there was no significant difference in threshold whether the two stimuli were initially presented to the same cerebral hemisphere or to opposite ones. How are human observers able to compare stimuli that fall at well separated positions in the visual field? We consider two classes of explanation: (i) Observers’ judgments might be based directly on the signals of dedicated ‘comparator neurons’, i.e. neurons drawing inputs of opposite sign from local regions of the visual field. (ii) Signals about local features might be transmitted to the site of comparison by a shared ‘cerebral bus’, where the same physical substrate carries different information from moment to moment. The minimal effects of proximity and direction (which might be expected to influence local detectors of relative motion), and the combinatorial explosion in the number of comparator neurons that would be required by (i), lead us to favor models of type (ii).
dc.description.sponsorshipMarina
dc.format.mediumElectronic-eCollectionen
dc.languageengen
dc.publisherPublic Library of Science (PLoS)
dc.rightsAll rights reserved
dc.subjectHumansen
dc.subjectSpace Perceptionen
dc.subjectVisual Perceptionen
dc.subjectMotion Perceptionen
dc.subjectPsychophysicsen
dc.subjectTime Factorsen
dc.titleHow does the human visual system compare the speeds of spatially separated objects?en
dc.typeArticle
prism.issueIdentifier4en
prism.publicationDate2020en
prism.publicationNamePloS oneen
prism.startingPagee0231959
prism.volume15en
dc.identifier.doi10.17863/CAM.51678
dcterms.dateAccepted2020-04-04en
rioxxterms.versionofrecord10.1371/journal.pone.0231959en
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2020-01en
dc.contributor.orcidDanilova, MV [0000-0002-1276-6252]
dc.contributor.orcidMollon, John [0000-0001-8533-033X]
dc.identifier.eissn1932-6203
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idBBSRC (BB/S000623/1)
cam.orpheus.counter2*
rioxxterms.freetoread.startdate2023-04-21


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