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Proceedings Paper

Matching visual and nonvisual signals: evidence for a mechanism to discount optic flow during locomotion
Author(s): Adrian Thurrell; Adar Pelah
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Paper Abstract

We report on recent experiments to investigate the Arthrovisual Locomotor Effect (ALE), a mechanism based on non-visual signals postulated to discount or remove the self-generated visual motion signals during locomotion. It is shown that perceptual matches made by standing subjects to a constant motion optic flow stimulus that is viewed while walking on a treadmill are linearly reduced by walking speed, a measure of the reported ALE. The degree of reduction in perceived speed depends on the similarity of the motor activity to natural locomotion, thus for the four activities tested, ALE strength is ranked as follows: Walking > Cycling > Hand Pedalling > Finger Tapping = 0. Other variations and important controls for the ALE are described.

Paper Details

Date Published: 18 March 2005
PDF: 15 pages
Proc. SPIE 5666, Human Vision and Electronic Imaging X, (18 March 2005); doi: 10.1117/12.610856
Show Author Affiliations
Adrian Thurrell, Univ. College London (United Kingdom)
Univ. of Cambridge (United Kingdom)
Adar Pelah, Univ. of York (United Kingdom)

Published in SPIE Proceedings Vol. 5666:
Human Vision and Electronic Imaging X
Bernice E. Rogowitz; Thrasyvoulos N. Pappas; Scott J. Daly, Editor(s)

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