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  Audio-visual interactions in binocular rivalry using the Shepard illusion in the auditory and visual domain

Conrad, V., Kleiner, M., Hartcher-O‘Brien, J., Bartels, A., Bülthoff, H., & Noppeney, U. (2010). Audio-visual interactions in binocular rivalry using the Shepard illusion in the auditory and visual domain. Poster presented at 11th International Multisensory Research Forum (IMRF 2010), Liverpool, UK.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-BFB0-F Version Permalink: http://hdl.handle.net/21.11116/0000-0003-1D6B-6
Genre: Poster

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 Creators:
Conrad, V1, 2, 3, 4, Author              
Kleiner, M1, 4, 5, Author              
Hartcher-O‘Brien, J2, 4, Author              
Bartels, A4, 6, Author              
Bülthoff, HH1, 4, Author              
Noppeney, U3, 4, Author              
Affiliations:
1Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
2Research Group Multisensory Perception and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497806              
3Research Group Cognitive Neuroimaging, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497804              
4Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              
5Project group: Cognitive Engineering, Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_2528702              
6Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497798              

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 Abstract: When both eyes are presented with dissimilar images, human observers report alternating percepts - a phenomenon known as binocular rivalry. Subjects were presented dichoptically with (1) a looming/receding starfield or (2) a looming/receding Shepard Zoom (Berger, Siggraph 2003), the visual equivalent of the Shepard tone illusion. In four psychophysical experiments, we investigated the influence of (1) a real complex tone rising/falling in pitch and (2) rising/falling Shepard tones on the dominance and suppression times of the rivaling visual motion percepts (relative to non-motion sounds or no sounds). First, we observed longer dominance times of looming than receding visual percepts even in the absence of sound. Second, auditory looming signals enhanced this looming bias by lengthening the dominance periods of their congruent visual looming percept. Third, receding auditory motion signals reduced the perceptual looming bias, though this effect was less pronounced and not consistently observed. Collectively, the results show that the perceptual predominance of looming relative to receding visual motion is amplified by congruent looming/receding auditory signals during binocular rivalry. Auditory looming/receding signals may influence the dominance times of their congruent and incongruent visual percepts via genuine multisensory and higher order attentional mechanisms at multiple levels of the cortical hierarchy.

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 Dates: 2010-06
 Publication Status: Published in print
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 Identifiers: BibTex Citekey: 6570
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Title: 11th International Multisensory Research Forum (IMRF 2010)
Place of Event: Liverpool, UK
Start-/End Date: 2010-06-16 - 2010-06-19

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Title: 11th International Multisensory Research Forum (IMRF 2010)
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: 229 Start / End Page: - Identifier: -