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  Multisensory integration of non-visual sensory information for the perceptual estimation of walking speed

Frissen, I., Souman, J., & Ernst, M. (2008). Multisensory integration of non-visual sensory information for the perceptual estimation of walking speed. Poster presented at 9th International Multisensory Research Forum (IMRF 2008), Hamburg, Germany.

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Frissen, I1, 2, 3, Author           
Souman, JL1, 2, 3, Author           
Ernst, MO1, 3, Author           
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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              
3Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: A variety of sources of sensory information (e.g., visual, inertial and proprioceptive) are available for the estimation of walking speed. However, little is known about how they are integrated. We present a series of experiments, using a 2-IFC walking speed judgment task, investigating the relative contributions of the inertial and proprioceptive information. We used a circular treadmill equipped with a motorized handlebar, to manipulate inertial and proprioceptive inputs independently. In one experiment we directly compared walking-in-place (WIP) and walking-through-space (WTS). We found that WIP is perceived as slower than WTS. The WIP condition creates a special conflict situation because the proprioceptive cue indicates motion whereas the inertial cue indicates an absence of motion through space. In another experiment we presented a range of conflicts by combining a single proprioceptive input with different inertial inputs. We found that the inertial input is weighted more heavily when it indicates a faster walking speed than proprioception. Conversely, it receives less weight if it indicates a lower speed. This suggests that the inertial cue becomes more reliable with increasing velocity. Our findings show a more important role for inertial information in the perception of walking speed than has previously been suggested in the literature.

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 Dates: 2008-07
 Publication Status: Published in print
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 Identifiers: BibTex Citekey: 5477
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Title: 9th International Multisensory Research Forum (IMRF 2008)
Place of Event: Hamburg, Germany
Start-/End Date: 2008-07-16 - 2008-07-19

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Title: 9th International Multisensory Research Forum (IMRF 2008)
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: 179 Start / End Page: 266 Identifier: -