Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/20518
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dc.contributor.authorBell, Jason-
dc.contributor.authorGheorghiu, Elena-
dc.contributor.authorHess, Robert F-
dc.contributor.authorKingdom, Frederick A A-
dc.date.accessioned2014-06-24T23:10:04Z-
dc.date.issued2011-08-
dc.identifier.urihttp://hdl.handle.net/1893/20518-
dc.description.abstractRadial Frequency (RF) patterns can be used to study the processing of familiar shapes, e.g. triangles and squares. Opinion is divided over whether the mechanisms that detect these shapes integrate local orientation and position information directly, or whether local orientations and positions are first combined to represent extended features, such as curves, and that it is local curvatures that the shape mechanism integrates. The latter view incorporates an intermediate processing stage, the former does not. To differentiate between these hypotheses we studied the processing of micro-patch sampled RF patterns as a function of the luminance polarity of successive elements on the contour path. Our first study measures shape after effects involving suprathreshold amplitude RF shapes and shows that alternating the luminance polarity of successive micro-patch elements disrupts adaptation of the global shape. Our second study shows that polarity alternations also disrupt sensitivity to threshold-amplitude RF patterns. These results suggest that neighbouring points of the contour shape are integrated into extended features by a polarity selective mechanism, prior to global shape processing, consistent with the view that for both threshold amplitude and suprathreshold amplitude patterns, global processing of RF shapes involves an intermediate stage of processing.en_UK
dc.language.isoen-
dc.publisherElsevier-
dc.relationBell J, Gheorghiu E, Hess RF & Kingdom FAA (2011) Global shape processing involves a hierarchy of integration stages, Vision Research, 51 (15), pp. 1760-1766.-
dc.rightsThe publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.-
dc.subjectContouren_UK
dc.subjectCurvatureen_UK
dc.subjectOrientationen_UK
dc.subjectAdaptationen_UK
dc.subjectShapeen_UK
dc.titleGlobal shape processing involves a hierarchy of integration stagesen_UK
dc.typeJournal Articleen_UK
dc.rights.embargodate2999-12-31T00:00:00Z-
dc.rights.embargoreasonThe publisher does not allow this work to be made publicly available in this Repository therefore there is an embargo on the full text of the work.-
dc.identifier.doihttp://dx.doi.org/10.1016/j.visres.2011.06.003-
dc.citation.jtitleVision Research-
dc.citation.issn0042-6989-
dc.citation.volume51-
dc.citation.issue15-
dc.citation.spage1760-
dc.citation.epage1766-
dc.citation.publicationstatusPublished-
dc.citation.peerreviewedRefereed-
dc.type.statusPublisher version (final published refereed version)-
dc.author.emailelena.gheorghiu@stir.ac.uk-
dc.contributor.affiliationMcGill University-
dc.contributor.affiliationPsychology-
dc.contributor.affiliationUniversity of Cambridge-
dc.contributor.affiliationMcGill University-
dc.rights.embargoterms2999-12-31-
dc.rights.embargoliftdate2999-12-31-
dc.identifier.isi000294312500005-
Appears in Collections:Psychology Journal Articles

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