Linking appearance to neural activity through the study of the perception of lightness in naturalistic contexts

dc.contributor.authorMaertens, Marianne
dc.contributor.authorShapley, Robert
dc.date.accessioned2017-10-27T13:07:51Z
dc.date.available2017-10-27T13:07:51Z
dc.date.issued2013
dc.descriptionDieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.de
dc.descriptionThis publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.en
dc.description.abstractThe present paper deals with the classical question how a psychological experience, in this case apparent lightness, is linked by intervening neural processing to physical variables. We address two methodological issues: (a) how does one know the appropriate physical variable (what is the right x ?) to look at, and (b) how can behavioral measurements be used to probe the internal transformation that leads to psychological experience. We measured so-called lightness transfer functions (LTFs), that is the functions that describe the mapping between retinal luminance and perceived lightness for naturalistic checkerboard stimuli. The LTFs were measured for different illumination situations: plain view, a cast shadow, and an intervening transparent medium. Observers adjusted the luminance of a comparison patch such that it had the same lightness as each of the test patches. When the data were plotted in luminance–luminance space, we found qualitative differences between mapping functions in different contexts. These differences were greatly diminished when the data were plotted in terms of contrast. On contrast–contrast coordinates, the data were compatible with a single linear generative model. This result is an indication that, for the naturalistic scenes used here, lightness perception depends mostly on local contrast. We further discuss that, in addition to the mean adjustments, one may fi nd it useful to consider also the variability of an observer’s adjustments in order to infer the true luminance-to-lightness mapping function.en
dc.description.sponsorshipDFG, MA5127/1-1, Die Bestimmung der Beziehung zwischen subjektiver Empfindung und Diskriminationsvermögen durch eine Kombination aus Psychophysik, Computationaler Modellierung und der Messung neuronaler Antwortenen
dc.identifier.eissn1469-8714
dc.identifier.issn0952-5238
dc.identifier.urihttps://depositonce.tu-berlin.de//handle/11303/7082
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-6391
dc.language.isoen
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subject.ddc590 Tiere (Zoologie)
dc.subject.ddc610 Medizin und Gesundheit
dc.subject.otherlightnessen
dc.subject.othercontexten
dc.subject.othercontrasten
dc.subject.othernaturalistic scenesen
dc.titleLinking appearance to neural activity through the study of the perception of lightness in naturalistic contextsen
dc.typeArticle
dc.type.versionpublishedVersion
dcterms.bibliographicCitation.doi10.1017/s0952523813000229
dcterms.bibliographicCitation.issue5-6
dcterms.bibliographicCitation.journaltitleVisual neuroscience
dcterms.bibliographicCitation.originalpublishernameCambridge University Press
dcterms.bibliographicCitation.originalpublisherplaceCambridge
dcterms.bibliographicCitation.pageend298
dcterms.bibliographicCitation.pagestart289
dcterms.bibliographicCitation.volume30
tub.accessrights.dnbdomain
tub.affiliationFak. 4 Elektrotechnik und Informatik>Inst. Softwaretechnik und Theoretische Informatik>FG Modellierung kognitiver Prozessede
tub.affiliation.facultyFak. 4 Elektrotechnik und Informatikde
tub.affiliation.groupFG Modellierung kognitiver Prozessede
tub.affiliation.instituteInst. Softwaretechnik und Theoretische Informatikde
tub.publisher.universityorinstitutionTechnische Universität Berlin
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