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Audio-visual interactions in perception and response selection

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons84310

Werner,  S
Research Group Cognitive Neuroimaging, Max Planck Institute for Biological Cybernetics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons84112

Noppeney,  U
Research Group Cognitive Neuroimaging, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Werner, S., & Noppeney, U. (2008). Audio-visual interactions in perception and response selection. Talk presented at 50. Tagung Experimentell Arbeitender Psychologen (TeaP 2008). Marburg, Germany.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0013-CA4B-D
Abstract
Both physical and physiological transmission times can differ between audition and vision. Under certain conditions, the brain reduces perceived asynchrony by adapting to this temporal discrepancy. In two experiments we investigated whether this recalibration is specific to auditory and visual stimuli, or whether other modality combinations (audiotactile, visuotactile) are affected, as well. We presented asynchronous audiovisual signals, with either auditory leading or visual leading. Then, using temporal order judgments we measured observers point of subjective simultaneity for three modality combinations. Results indicate an adjustment of perceived simultaneity for the audiovisual and the visuotactile modality pairs. We conclude that audiovisual adaptation is the result of a change of processing latencies of visual events. In a second experiment, we corroborate this finding. We demonstrate that reaction times to visual signals, but not to tactile or auditory signals, change as a result of audiovisual recalibration.