Illusory position shift induced by cyclopean motion |
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Authors: | Ikuya Murakami Yasuhiro Kashiwabara |
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Affiliation: | Department of Life Sciences, University of Tokyo, Tokyo, Japan |
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Abstract: | The position of a visual pattern moving within a static aperture appears to be displaced in the direction of motion. This illusory position shift can be induced by luminance-defined as well as contrast-defined motion. The present study used a random-dot binocular correlogram in which a moving square-wave grating was solely defined by binocular correlations. This cyclopean motion was found to induce illusory position shift. Consistent with previous reports on position shift induced by second-order motion, the illusion was smaller than that found in the case of the first-order motion. This pattern of results unequivocally demonstrates the existence of a binocular mechanism mediating this illusion. |
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Keywords: | Motion Position Illusion Binocular correlation Second-order motion |
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