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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 Fraser-Wilcox Illusion and Its Extension

The Fraser-Wilcox Illusion and Its Extension

Chapter:
(p.500) Chapter 68 The Fraser-Wilcox Illusion and Its Extension
Source:
The Oxford Compendium of Visual Illusions
Author(s):

Akiyoshi Kitaoka

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199794607.003.0068

The Fraser-Wilcox illusion is one of the anomalous motion illusions observed in a stationary image, and its extension, including “rotating snakes,” which has been used extensively via the Internet, are reviewed in this chapter. Perceptual dimorphism featuring the Fraser-Wilcox illusion is explained by an interaction between two different illusions. Darkening disambiguation of the Fraser-Wilcox illusion, perceptual dimorphism, the optimized Fraser-Wilcox illusions, the effect of age on the illusion magnitude, as well as the role of color including color enhancement are demonstrated and discussed. The timing-difference model and the eye-movement model are also explored. Recent studies that relate to these concepts are also examined.

Keywords:   illusion, Fraser-Wilcox illusion, motion, perceptual dimorphism, rotating snakes, color

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