Calibration, information, and control strategies for braking to avoid a collision.

  • Brett R. Fajen
  • Published 2005 in
    Journal of experimental psychology. Human…


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.

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@article{Fajen2005CalibrationIA, title={Calibration, information, and control strategies for braking to avoid a collision.}, author={Brett R. Fajen}, journal={Journal of experimental psychology. Human perception and performance}, year={2005}, volume={31 3}, pages={480-501} }