Abstract
Targets were displaced to cancel an apparent displacement induced by a step motion of a background or were held stationary while appearing to jump in an induced displacement. Target and background were then extinguished, and the subject pointed to the target’s last position. When the target had appeared to move but did not, background position did not significantly affect pointing; when the target had moved but appeared to remain stationary (displacement canceled by opposite induced displacement), pointing depended upon the target’s egocentric position. A similar result was obtained with sinusoidal motion. In terms of a two visual-systems hypothesis, the motor system uses more veridical spatial information and is less affected by relative changes in two retinal signals than is the cognitive system.
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Bridgeman, B., Kirch, M. & Sperling, A. Segregation of cognitive and motor aspects of visual function using induced motion. Perception & Psychophysics 29, 336–342 (1981). https://doi.org/10.3758/BF03207342
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DOI: https://doi.org/10.3758/BF03207342