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Citation |
Fajen BR. J. Exp. Psychol. Hum. Percept. Perform. 2005; 31(3): 480-501. |
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Affiliation |
Department of Cognitive Science, Rensselaer Polytechnic Institute, Carnegie Building 308, 110 8th Street, Troy, NY 12180, USA. fajenb@rpi.edu |
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Copyright |
(Copyright © 2005, American Psychological Association) |
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DOI |
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PMID |
15982127 |
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Abstract |
This study explored visual control strategies for braking to avoid collision by manipulating information about speed of self-motion. Participants watched computer-generated displays and used a brake to stop at an object in the path of motion. Global optic flow rate and edge rate were manipulated by adjusting eye-height and ground-texture size. Stopping distance, initiation of braking, and the magnitude of brake adjustments were influenced by both optical variables, but global optic flow rate had a stronger effect. A new model is introduced according to which braking is controlled by keeping the perceived ideal deceleration, based in part on global optic flow rate, within a "safe" region between 0 and the maximum deceleration of the brake. Language: en |