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The Oxford Compendium of Visual Illusions$
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Arthur G. Shapiro and Dejan Todorovic

Print publication date: 2017

Print ISBN-13: 9780199794607

Published to Oxford Scholarship Online: June 2017

DOI: 10.1093/acprof:oso/9780199794607.001.0001

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The Hollow-Mask Illusion and Variations

The Hollow-Mask Illusion and Variations

(p.614) Chapter 87 The Hollow-Mask Illusion and Variations
The Oxford Compendium of Visual Illusions

Thomas V. Papathomas

Oxford University Press

When viewers see a hollow mask, they misperceive it as a regular convex face. This is the basic form of the hollow-mask illusion, but the illusion involves misperceived motion as well. Namely, when stationary observers view a rotating hollow mask, they perceive a convex face that appears to rotate in the opposite direction; in a dual situation, moving observers perceive a stationary hollow mask as a convex face that appears to rotate as if to “follow” them. This chapter reviews the hollow-mask illusion and examines factors that enhance or weaken it, pathological responses to it, developmental and computational issues, some variants of the illusion, as well its significance in brain research.

Keywords:   hollow mask, face, mask, misperceived motion, hollow-mask illusion

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