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Updated: Jan 2, 2026
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Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
Published on: April 16, 2014
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Factors underlying visual illusions are illusion-specific but not feature-specific.
Aline F Cretenoud1, Harun Karimpur2,3, Lukasz Grzeczkowski1,4
1Laboratory of Psychophysics, Brain Mind Institute, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
Journal of Vision
|December 13, 2019
Summary
Visual illusions appear to be highly specific, with little evidence for a common underlying factor. Most visual illusions operate independently, suggesting unique mechanisms for each.
Area of Science:
- Psychology
- Cognitive Science
- Visual Perception
Background:
- Common factors, like intelligence (g), are well-established in some domains.
- Evidence for common factors in visual perception is weak, with low correlations between illusion magnitudes.
- This study investigates the specificity of visual illusions, drawing parallels to hyper-specificity in perceptual learning.
Purpose of the Study:
- To determine if visual illusions are hyper-specific.
- To investigate the existence of common underlying mechanisms across different visual illusions.
- To analyze correlations between variants of the same illusion and across different illusions.
Main Methods:
- Tested 19 variants of the Ebbinghaus illusion differing in color, shape, or texture.
- Reanalyzed data from an experiment testing 10 illusions under four luminance conditions.
- Tested five visual illusions across four orientations.
Main Results:
- Correlations between variants of the Ebbinghaus illusion were mostly significant.
- Significant correlations were found between different luminance conditions of the same illusion.
- Weak correlations were observed between different visual illusions, suggesting distinct underlying mechanisms.
Conclusions:
- Visual illusions appear to be hyper-specific.
- There is little evidence for a unique common mechanism underlying the tested visual illusions.
- Each visual illusion likely relies on its own distinct factor or mechanism.
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