I. Hadani

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The 3-dot hyperacuity task was given to two subjects under three experimental paradigms: constant luminance, constant energy and constant duration. Hyperacuity was obtained under conditions (3 dots, 2 msec exposure) which rule out any significant temporal or spatial averaging. There was a clear threshold decrease in the constant luminance paradigm as(More)
A deterministic model for monocular space perception is presented. According to the model, retinal luminance changes due to involuntary eye movements are detected and locally analyzed to yield the angular velocity of each image point. The stable three-dimensional spatial coordinates of viewed objects are then reconstructed using a method of infinitesimal(More)
A fundamental problem in the study of spatial orientation concerns how a mobile observer navigates in space on the basis of retinal and extraretinal signals while obtaining the perceptual constancies of position size and shape across head and eye movements. This problem was dealt with by the inferential, direct perception, and computational approaches, yet(More)
Coherent motion of random dot pattern across a stationary stereograting at 1-5.5 deg/s causes an impairment in perceiving the stereograting which is associated with optokinetic nystagmus. This study was aimed towards understanding the cause of the impairment. We tested two alternative hypotheses: (1) that the impairment is caused by efferent-afferent(More)
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