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dc.contributor.authorLawrence, S.J.D.*
dc.contributor.authorKeefe, B.D.*
dc.contributor.authorVernon, R.J.W.*
dc.contributor.authorWade, A.R.*
dc.contributor.authorMcKeefry, Declan J.*
dc.contributor.authorMorland, A.B.*
dc.date.accessioned2016-08-04T13:55:37Z
dc.date.available2016-08-04T13:55:37Z
dc.date.issued2016-05-16
dc.identifier.citationLawrence SJD, Keefe BD, Vernon RJW, Wade AR, McKeefry DJ and Morland AB (2016) Global shape aftereffects in composite radial frequency patterns. Journal of Vision. 16(7): 1-13.en_US
dc.identifier.urihttp://hdl.handle.net/10454/8745
dc.descriptionYesen_US
dc.description.abstractIndividual radial frequency (RF) patterns are generated by modulating a circle's radius as a sinusoidal function of polar angle and have been shown to tap into global shape processing mechanisms. Composite RF patterns can reproduce the complex outlines of natural shapes and examining these stimuli may allow us to interrogate global shape mechanisms that are recruited in biologically relevant tasks. We present evidence for a global shape aftereffect in a composite RF pattern stimulus comprising two RF components. Manipulations of the shape, location, size and spatial frequency of the stimuli revealed that this aftereffect could only be explained by the attenuation of intermediate-level global shape mechanisms. The tuning of the aftereffect to test stimulus size also revealed two mechanisms underlying the aftereffect; one that was tuned to size and one that was invariant. Finally, we show that these shape mechanisms may encode some RF information. However, the RF encoding we found was not capable of explaining the full extent of the aftereffect, indicating that encoding of other shape features such as curvature are also important in global shape processing.en_US
dc.description.sponsorshipThis research was supported by a Biotechnology and Biological Sciences Research Council (BBSRC) grant #BB/L007770/1.en_US
dc.language.isoenen_US
dc.relation.isreferencedbyhttp://dx.doi.org/10.1167/16.7.17en_US
dc.rights(c) 2016 ARVO. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (http://creativecommons.org/licenses/by-nc-nd/4.0).en_US
dc.subjectRadial frequency; Global shape; Composite RF; Aftereffecten_US
dc.titleGlobal shape aftereffects in composite radial frequency patternsen_US
dc.status.refereedYesen_US
dc.typeArticleen_US
dc.type.versionpublished version paperen_US
refterms.dateFOA2018-07-25T12:50:20Z


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