Saltation through the blind spot

Abstract

At least three localization illusions can be produced by varying the time relations between two stimuli. Two of these, phi motion and Békésy's illusion, have been induced in areas lacking receptors. To learn if this also occurred with the third illusion, sensory saltation, people reported their observations when Geldard's visual rabbit was induced by stimulating points around the optic disk. The rabbit crossed the blind spot as well as other portions of the eyes, and the illusory point was often localized within the region of the blind spot. All three illusions can be localized in an area devoid of receptors. © 1980 Psychonomic Society, Inc.