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  Nonlinear temporal distortions in vision and audition

Hartcher-O‘Brien, J., Telgen, S., Di Luca, M., & Ernst, M. (2010). Nonlinear temporal distortions in vision and audition. 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-BFDA-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-A079-1
Genre: Poster

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Hartcher-O‘Brien, J1, 2, Author              
Telgen, S1, 2, Author              
Di Luca, M1, 2, 3, Author              
Ernst, MO1, 2, Author              
Affiliations:
1Research Group Multisensory Perception and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497806              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              
3Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              

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 Abstract: Perceived time is not veridical but distorted and differs across the senses. Here we ask, which points in the perception of a temporal event contribute most significantly to these multisensory distortions? To this end, we investigated perceptual estimates of temporal landmarks (onset, peak amplitude, and offset) for a Gaussian standard signal (s=150ms). Particularly we were interested in how the perception of these landmarks differ across vision and audition. Participants undertook a temporal order judgment task comparing the onset, peak and offset landmarks of the standard stimuli to short spike-like stimuli (s=5ms) in vision or audition. All four combinations were tested: V-v, A-a, V-a, A-v. Results demonstrate that the visual as compared to auditory standard stimuli were perceived shorter. More interestingly, we found a compression in the perceived duration for onset-peak intervals compared to peak-offset intervals. This compression effect was more pronounced in the visual modality. Discrimination threshol ds were worse for offset judgements compared to onset or peak judgements in both modalities. The differences in perceived duration can potentially be used to explain multisensory illusions such as the flash lag effect and perceived crossmodal asynchronies. We quantitatively explain these distortion effects using models of signal processing.

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 Dates: 2010-06
 Publication Status: Published in print
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 Identifiers: BibTex Citekey: 6660
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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: 393 Start / End Page: - Identifier: -