Sound-driven enhancement of vision: disentangling detection from decisional level contributions
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- dc.contributor.author Pérez-Bellido, Alexisca
- dc.contributor.author Soto-Faraco, Salvador, 1970-ca
- dc.contributor.author López-Moliner, Joanca
- dc.date.accessioned 2015-11-16T10:47:02Z
- dc.date.available 2015-11-16T10:47:02Z
- dc.date.issued 2012ca
- 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/pdfca
- 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.00226.2012ca
- dc.identifier.doi http://dx.doi.org/10.1152/jn.00226.2012
- dc.identifier.issn 0022-3077ca
- dc.identifier.uri http://hdl.handle.net/10230/25096
- dc.language.iso engca
- dc.publisher American Physical Societyca
- dc.relation.ispartof Journal of Neurophysiology. 2012 Dec 05;109(4): 1065-77
- dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/263145ca
- dc.relation.projectID info:eu-repo/grantAgreement/ES/2PN/CSD2007-00012
- dc.rights © American Physical Society. Published article available at http://jn.physiology.org/ca
- dc.rights.accessRights info:eu-repo/semantics/openAccessca
- 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.title Sound-driven enhancement of vision: disentangling detection from decisional level contributionsca
- dc.type info:eu-repo/semantics/articleca
- dc.type.version info:eu-repo/semantics/submittedVersionca