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Sound-driven enhancement of vision: disentangling detection from decisional level contributions

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dc.contributor.author Pérez-Bellido, Alexis
dc.contributor.author Soto-Faraco, Salvador, 1970-
dc.contributor.author López-Moliner, Joan
dc.date.accessioned 2015-11-16T10:47:02Z
dc.date.available 2015-11-16T10:47:02Z
dc.date.issued 2012
dc.identifier.citation Pérez-Bellido A, Soto-Faraco S, López-Moliner J. Sound-driven enhancement of vision: disentangling detection from decisional level contributions. J Neurophysiol. 2012 Dec 05;109(4): 1065-77. DOI 10.1152/jn.00226.2012
dc.identifier.issn 0022-3077
dc.identifier.uri http://hdl.handle.net/10230/25096
dc.description.abstract Cross-modal enhancement can be mediated both by higher-order effects due to attention and decision making and by detection-level stimulus-driven interactions. However, the contribution of each of these sources to behavioral improvements has not been conclusively determined and quantified separately. Here, we apply psychophysical analysis based on Piéron functions in order to separate stimulus-dependent changes from those accounted by decision-level contributions. Participants performed a simple visual speeded detection task on Gabor patches of different spatial frequencies and contrast values, presented with and without accompanying sounds. On one hand, we identified an additive cross-modal improvement in mean reaction times across all types of visual stimuli that would be well explained by interactions not strictly based on stimulus-driven modulations (e.g., due to reduction of temporal uncertainty and motor times). On the other hand, we singled out an audio-visual benefit that strongly depended on stimulus features such as frequency and contrast. This particular enhancement was selective to low-visual spatial frequency stimuli, optimized for magnocellular sensitivity. We therefore conclude that interactions at detection stages and at decisional processes in response selection that contribute to audio-visual enhancement can be separated online and express on partly different aspects of visual processing.
dc.description.sponsorship This research was supported by the Spanish Ministry of Science and Innovation (PSI2010-15867, PSI2010-15426, and Consolider INGENIO CSD2007-00012), Comissionat per a Universitats i Recerca del DIUE-Generalitat de Catalunya (SGR2009-092, SGR2009-308), and the European Research Council (StG-2010263145).
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher American Physical Society
dc.relation.ispartof Journal of Neurophysiology. 2012 Dec 05;109(4): 1065-77
dc.rights © American Physical Society. Published article available at http://jn.physiology.org/
dc.title Sound-driven enhancement of vision: disentangling detection from decisional level contributions
dc.type info:eu-repo/semantics/article
dc.identifier.doi http://dx.doi.org/10.1152/jn.00226.2012
dc.subject.keyword Sensory integration
dc.subject.keyword Reaction time
dc.subject.keyword Psychophysics
dc.subject.keyword Audio-visual stimuli
dc.subject.keyword Magnocellular pathway
dc.subject.keyword Race models
dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/263145
dc.relation.projectID info:eu-repo/grantAgreement/ES/2PN/CSD2007-00012
dc.rights.accessRights info:eu-repo/semantics/openAccess
dc.type.version info:eu-repo/semantics/submittedVersion


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