Direction-selective adaptation and simultaneous contrast induced by stereoscopic (cyclopean) motion
| Autor: | Robert Patterson, Steve Becker |
|---|---|
| Jazyk: | angličtina |
| Předmět: |
Male
Vision Disparity Motion Perception Stereoscopy Fixation Ocular Adaptation aftereffects Direction selective Luminance law.invention Contrast Sensitivity Optics law Humans Motion perception Lighting Physics Adaptation Ocular business.industry Stereoscopic motion Afterimage Sensory Systems Ophthalmology Cyclopean motion Stereopsis Pattern Recognition Visual After effect Binocular disparity Female business |
| Zdroj: | Vision Research. (12):1773-1781 |
| ISSN: | 0042-6989 |
| DOI: | 10.1016/0042-6989(95)00239-1 |
| Popis: | Across four experiments, this study investigated direction-specific adaptation and simultaneous contrast induced by moving binocular disparity information (stereoscopic motion). The stimuli were moving arrays of stereoscopic dots created from dynamic random-element stereograms. Experiments 1 and 2 examined the effects of adaptation to motion in a given direction on the apparent direction of test motion. Results showed that the direction of test motion appeared repulsed away from the direction of adapting motion (repulsion aftereffect) by as much as 20 deg or more when directions of adapt and test were similar. Experiment 3 investigated transfer of the repulsion aftereffect across the stereoscopic and luminance domains by employing stereoscopic adapting motion and luminance test motion or vice versa. Results showed that the repulsion aftereffect transferred across the two stimulus domains. Experiment 4 investigated direction-specific contrast by measuring the perceived direction of two stereoscopic arrays presented simultaneously and moving in different directions. Results showed that the directions of the arrays appeared repulsed away from one another when their directions were similar. Taken together, these results suggest that the direction of stereoscopic motion is coded in the activity of directionally selective mechanisms, as is the case for luminance-domain motion. Transfer of the repulsion aftereffect between stereoscopic and luminance domains indicates the two kinds of motion perception are mediated by a common substrate. |
| Databáze: | OpenAIRE |
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