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An empirical taxonomy of visual illusions |
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| Authors: | Stanley Coren Joan S. Girgus Howard Erlichman A. Ralph Hakstian |
| Affiliation: | 1. University of British Columbia, V6T 1 W5, Vancouver, British Columbia, Canada 2. The City College of the City University of New York, 10010, New York 3. The Graduate Centre of the City University of New York, 10036, New York, New York |
| Abstract: | A classification system for visual-geometric illusions, based upon the interrelationships between behavioral responses to various distortions was created. Forty-five illusion configurations were presented to 221 observers. Factor analysis revealed that there are five classes of illusions. A secondorder analysis revealed that visual distortions are ultimately reducible to two global types of distortions: illlusions of extent and illusions of shape or direction. |
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