Adapting to expansion increases perceived time-to-collision.
We used a tracking method to measure errors in estimating absolute time-to-collision caused by adapting to an expanding target. After adaptation, the estimated time-to-collision was longer than in the baseline condition. This was the case whether estimates were based on binocular information alone or monocular information alone. Estimates of time-to-collision were lengthened by 8-16% when based on binocular information alone, and by 18-25% when based on monocular information alone. These findings are consistent with a previous proposal that changing-size and changing-disparity information converge before the stage at which motion-in-depth signals are generated.
Gray
R
R
Department of Psychology, York University, Ont., Canada.
Regan
D
D
D000223:Adaptation, Psychological; D003867:Depth Perception / Q000502:physiology; D006801:Humans; D009039:Motion Perception / Q000502:physiology; D013997:Time Factors; D015357:Vision Disparity / Q000502:physiology; D015348:Vision, Binocular / Q000502:physiology*; D015349:Vision, Monocular / Q000502:physiology