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  Auditory and visual stimuli alter tactile motion perception

Vitello, M., & Ernst, M. (2007). Auditory and visual stimuli alter tactile motion perception. Poster presented at 10th Tübinger Wahrnehmungskonferenz (TWK 2007), Tübingen, Germany.

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 Creators:
Vitello, M1, 2, 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              

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 Abstract: Recently Sekuler et al. [1] investigated the motion-bounce illusion and found that sound can
influence ambiguous visual motion perception. Here we investigated the motion-bounce illusion
in the tactile-auditory and the tactile-visual domain, respectively. Using a vibro-tactile
belt consisting of 7 vibrators we generated tactile apparent motion stimuli by sequentially activating
neighboring motors with an onset of 200ms between the motors. Starting at the left
and the right hip, two tactile motion stimuli run towards each other. On the body midline an
ambiguous event was perceived: either the transition of both stimuli with continuing motion
trajectories or a bounce event followed by the reversal of the movement direction. Presenting
just the tactile motion stimulus resulted in an ambiguous percept. In the tactile-auditory
condition the presentation of an auditory beep 200ms before the collision was sufficient to disambiguate
the percept such that a significantly higher proportion of bounces was reported. The
presentation of the sound at the time of the tactile collision event or 400ms before reduced the
proportion bounces reported and became indistinguishable from the uni-modal baseline condition.
In the tactile-visual condition the presentation of a flashlight at the time of the tactile
collision, 200ms or 400ms before the collision induced a higher proportion of bounce reports.
This indicates that the temporal window of audio-tactile integration is comparable to that found
in the visual-auditory domain. These results suggest that similar supramodal mechanisms exist
for apparent motion perception.

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 Dates: 2007-07
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: BibTex Citekey: 4794
 Degree: -

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Title: 10th Tübinger Wahrnehmungskonferenz (TWK 2007)
Place of Event: Tübingen, Germany
Start-/End Date: 2007-07-27 - 2007-07-29

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Title: 10th Tübinger Perception Conference: TWK 2007
Source Genre: Proceedings
 Creator(s):
Bülthoff, HH1, Editor           
Chatziastros, A1, Editor           
Mallot, HA1, Editor           
Ulrich, R, Editor
Affiliations:
1 Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797            
Publ. Info: Kirchentellinsfurt, Germany : Knirsch
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 100 Identifier: ISBN: 3-927091-77-4