Cite as:
Hess R F, Huang P-C, Maehara G, 2009, "Spatial distortions produced by purely dichoptic-based visual motion" Perception 38(7) 1012 – 1018
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Spatial distortions produced by purely dichoptic-based visual motion

Robert F Hess, Pi-Chun Huang, Goro Maehara

Received 19 September 2008, in revised form 24 October 2008; published online 18 May 2009

Abstract. It is known that local, monocular motion (short-range motion) can produce local distortions of visual space. We wanted to know if local monocular motion was both sufficient and necessary for producing motion-based spatial distortions. We used a previously reported dichoptic motion stimulus in which the directional motion signal is not present in either eye’s input but is only present after binocular combination. We show that such a stimulus can also induce perceived changes in spatial position. This suggests that local, monocular motion while being sufficient is not necessary for the production of motion-based illusions. It suggests that one source of motion signals responsible for this illusion is from binocular motion mechanisms.

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