Journal
CURRENT BIOLOGY
Volume 14, Issue 11, Pages 1013-1017Publisher
CELL PRESS
DOI: 10.1016/j.cub.2004.05.042
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Perceptual alternation in viewing bistable stimuli can be slowed or halted if the stimuli are presented intermittently [1, 2]. Memory of the recent perceptual experience has been proposed to explain this stabilization effect. But the nature of this perceptual memory remains unclear. By using a bistable rotating cylinder and two dichoptically presented orthogonal gratings, we explored the features that are important for the stabilization by changing a particular feature of the stimuli between alternate presentations. For the rotating cylinder, changing its color, rotating speed, size, or its stereo depth had no or minimal effect on the stabilization of its perceived rotation direction. For binocular rivalry, when the two gratings were matched in strength and then swapped between the two eyes synchronously with the intermittent presentation, the percepts were usually stabilized to one eye. In both cases, perceptual stabilization occurred only if the stimuli were presented to the same retinal location. These results suggest that the stabilization of monocular bistable stimuli is likely due to the removal of local adaptation, insensitive to the features that define the object identity. For binocular rivalry, preservation of the direction of interocular suppression rather than memory of the stimulus identity accounts for the stabilization effect.
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