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dc.contributor.authorDoerschner, Katjaen_US
dc.contributor.authorKam, T. E.en_US
dc.contributor.authorKersten, D.en_US
dc.contributor.authorFleming, R.en_US
dc.contributor.authorSeong-Whan, L.en_US
dc.coverage.spatialSarasota, Floridaen_US
dc.date.accessioned2019-07-03T06:29:33Z
dc.date.available2019-07-03T06:29:33Z
dc.date.issued2012-05en_US
dc.identifier.issn1534-7362
dc.identifier.urihttp://hdl.handle.net/11693/52101
dc.descriptionDate of Conference: May 2012en_US
dc.descriptionConference name: The Annual meeting of the vision sciences society
dc.description.abstractRecently, we described several surface reflectance-specific motion characteristics that the visual system may use to determine whether a rotating object appears shiny or matte (Doerschner et al., 2011). We used an adaptation paradigm to test whether there exist neuronal populations that are sensitive to such reflectance-specific image motion characteristics. Stimuli were computer-rendered movies of 5 unfamiliar, rotating objects. Eleven stickiness levels for each object were created by morphing between 'sticky' (diffusely reflecting) and 'slipping' (100% specularly reflecting) renderings of a given object with different mixing values, resulting in a total of 55 movies. For familiarization purposes observers were first shown a sequence of movies of an object transitioning from sticky to slipping though all 11 levels. In the pre-test observers rated the apparent shininess for each movie on a scale from 1 (very matte) to 5 (very shiny). The order of presentation was randomized. During adaptation, observers first adapted to a sticky movie for 120 s. This was then followed by a 2 s test in which observers rated shininess. Every fifth trial was preceded by a 24 s top-up adaptation period. Importantly, in order to prevent low-level motion adaptation we randomly selected a new rotation axis (out of 6) for each 2 s interval for the adaptor during adaptation periods. We compared the shininess ratings of all movies in pre-, and post-test. Overall, we found that, across observers and objects, adaptation to a sticky movie significantly affected the perceived shininess of subsequent stimuli (All observers: F(1,1098)=10.4781 p<0.002). Post-hoc analysis revealed that an increase in perceived shininess occurred mainly at higher levels of stickiness. These results support the notion of cortical mechanisms sensitive to reflectance-specific image motion patterns.en_US
dc.language.isoEnglishen_US
dc.source.titleJournal of Visionen_US
dc.relation.isversionofhttps://doi.org/10.1167/12.9.871
dc.titleVisual adaptation to reflectance-specific image motionen_US
dc.typeConference Paperen_US
dc.departmentDepartment of Psychologyen_US
dc.departmentNational Magnetic Resonance Research Center (UMRAM)en_US
dc.citation.spage871en_US
dc.citation.epage871en_US
dc.citation.volumeNumber12en_US
dc.citation.issueNumber9en_US
dc.identifier.doi10.1167/12.9.871
dc.publisherVision Sciences Societyen_US


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