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How to Create and Use Binocular Rivalry
Published on: November 10, 2010
Strength and coherence of binocular rivalry depends on shared stimulus complexity
1Audiovisual Research Laboratory, School of Psychology, University of Sydney, NSW, Australia. davida@psych.usyd.edu.au
Vision Research
|October 20, 2006
Summary
Binocular rivalry between complex visual objects shows deep, coherent alternations. However, simple stimuli or one simple and one complex stimulus result in shallow, piecemeal rivalry, indicating local processes dominate initially.
Area of Science:
- Neuroscience
- Cognitive Science
- Visual Perception
Background:
- Binocular rivalry involves alternations in conscious perception when incompatible images are presented to each eye.
- Previous studies have explored rivalry using simple stimuli like gratings.
Purpose of the Study:
- To investigate how rivalry characteristics differ between simple stimuli (gratings) and complex visual objects (faces, houses).
- To determine if complex stimuli require similar complex stimuli for global rivalry.
- To explore the role of local versus global processing in binocular rivalry.
Main Methods:
- Comparison of binocular rivalry between simple stimuli (gratings) and complex visual objects (faces, houses).
- Measurement of rivalry depth of suppression and coherence of alternations.
- Face adaptation experiment with rivaling faces and rivaling face/grating pairs.
Main Results:
- Rivalry between complex objects showed deep suppression and coherent alternations.
- Rivalry between gratings showed shallow suppression and piecemeal alternations.
- Rivalry between a complex and a simple stimulus mirrored the shallow, piecemeal characteristics of simple-simple rivalry, indicating complex stimuli do not rival globally unless paired with another complex stimulus.
Conclusions:
- Binocular rivalry initially relies on local processes, triggered by the failure of binocular fusion.
- Global organization and coherent rivalry emerge through feedback from higher-level areas when both stimuli are complex.
- Local processing takes precedence over global feedback when one stimulus is simple, preventing coherent image formation and demonstrating the primacy of local over global processes.
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