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  Perception of crossmodal simultaneity is not transitive

Machulla, T., Di Luca, M., & Ernst, M. (2007). Perception of crossmodal simultaneity is not transitive. Poster presented at 30th European Conference on Visual Perception, Arezzo, Italy.

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 Creators:
Machulla, T1, Author           
Di Luca, M1, 2, Author           
Ernst, M1, Author           
Affiliations:
1Research Group Multisensory Perception and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497806              
2Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              

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 Abstract: When signals in different modalities are physically asynchronous, observers may still perceive them as being simultaneous due to differential physical transmission and physiological conduction delays. If sensory signals in different modalities are processed independently of each other as assumed by independent-channels models, then the relative timings that lead to perceived simultaneity should be transitive across several modality pairs. For instance, if modality A has to be presented 20 ms before modality B to seem simultaneous with it and modality B 10 ms before modality C, then A should be presented 30 ms before C to seem simultaneous with it. Using temporal order judgments we measured the point of subjective simultaneity (PSS) in three different modality pairs (visual-auditory, tactile-auditory, visual-tactile). Our results indicate that PSS are not transitive. Thus, we infer that signals are not processed independently from each other. Perceived signal timing in one modality depends on which other modality it is paired with. Therefore, independent-channels models cannot account for processes underlying decisions about simultaneity of signals in different modalities.

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 Dates: 2007-08
 Publication Status: Issued
 Pages: -
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 Identifiers: URI: http://www.perceptionweb.com/abstract.cgi?id=v070526
BibTex Citekey: 4522
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Title: 30th European Conference on Visual Perception
Place of Event: Arezzo, Italy
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