Ohtsuka S, Ono H, Suzuki M, 1999, "Kanizsa's amodal figure made with da Vinci stereopsis" Perception 28 ECVP Abstract Supplement
Kanizsa's amodal figure made with da Vinci stereopsis
S Ohtsuka, H Ono, M Suzuki
We presented stereograms with a monocular stimulus attached to a binocular occluder in each eye so that the shape of the occluded stimulus cannot be judged from the right-eye view or the left-eye view alone. The visual direction of each edge of the occluded stimulus was displaced outward but the shape of the occluded stimulus was judged 'correctly'. Displacements were in the direction opposite to Kanizsa's amodal shrinkage. Results cannot be explained by the idea of Erkelens et al (1996 Vision Research 36 2141 - 2147) that the cyclopean eye moves to achieve veridical perception for the monocular area. They can be explained, however, by our hypothesis that the visual system displaces a portion of the visual field to fit the two monocular views into a cyclopean one, and that there is an additional shape-perception mechanism that corrects for directional distortions.
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