Cite as:
Andrews T J, McCoy A N, 1997, "Can illusory motion disrupt tracking real motion?" Perception 26(3) 269 – 275
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Can illusory motion disrupt tracking real motion?

Timothy J Andrews, Allison N McCoy

Received 23 July 1996, in revised form 6 November 1996

Abstract. When rotating stripes or other periodic stimuli cross the retina at a critical rate, a reversal in the direction of motion of the stimuli is often seen. This illusion of motion perception was used to explore the roles of retinal and perceived motion in the generation of optokinetic nystagmus. Here we show that optokinetic nystagmus is disrupted during the perception of this illusion. Thus, when perceived and actual motion are in conflict, subjects fail to track the veridical movement. This observation suggests that the perception of motion can directly influence optokinetic nystagmus, even in the presence of a moving retinal image. A conflict in the neural representation of motion in different brain areas may explain these findings.

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