Classification of anomalous motion illusions

This classification is not completed or is not the accepted one. This is only my tentative proposal

since August 30, 2004  updated September 7, 2006


Type Characteristics Direction of illusory motion Source of illusion Examples Notes
I A smooth retinal slip generates this type Perpendicular to the retinal slip Misintegration of motion signals? Ouchi illusion, Pinna-Brelstaff illusion, and others
II A smooth retinal slip generates this type, where low-contrast regions appear to move The same direction as the retinal slip Visual latency? Kitaoka and Ashida, ECVP2002 Glasgow"An anomalous motion illusion based upon signal delay"

(cf. fluttering heart)
III A smooth retinal slip generates this type, where low-spatial-frequency parts appear to move The same direction as the retinal slip Difference in apparent speed? Kitaoka and Ashida, forthcoming
IV Chromatic edges appear to move ? Dynamic changes in chromatic abberation? Kitaoka, Kuriki and Ashida, under study

(cf. fluttering heart)
V Staircase-shape edges appear to move ? ? Kitaoka (2002) Trick Eyes. Tokyo: Kanzen
VI "Heat shimmer" appears ? ? Kitaoka (2002) Trick Eyes. Tokyo: Kanzen
VII An illusory "hop" appears ? ? Kitaoka (2002) Trick Eyes. Tokyo: Kanzen
VIII Parts appear to move in a constant direction Constant Luminance profile or luminance gradient Optimized Fraser-Wilcox illusion
Kitaoka and Ashida (2003a)
IX Parts appear to move in a constant direction Constant Luminance gradient "Central" drift illusion
Kitaoka and Ashida (2003b)
X Parts appear to move in either of the two directions Bistable Blink-dependent apparent movement? Blink-dependent rotation

cf. Faubert and Herbert's (1999) peripheral drift illusion (this should be an independent category)
XI Parts appear to move in a constant direction Constant Cross of lines under study

There are some images that cannot be classified into any of these categories.


Illusion catalogue

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