Classic geometrical illusion 5

since July 15, 2006


"Ebbinghaus illusion using faces"

The face in the center of the left cluster is the same size of the face in the center of the right cluster, but the latter appears to be larger than the former.

Copyright Akiyoshi .Kitaoka 2007 (April 8)

I would like to add my preliminary observation that the right face appears to be more charming than the left one.


"Gold rain"

In each row, parallelograms are aligned vertically. But the outer rows appear to tilt clockwise while the inner ones counterclockwise. In addition, the inner rows appear to move downward.

Copyright Akiyoshi Kitaoka 2006 (August 28)


"Ritsumeikan Psychology tilt illusion"

The letter rows of "Ritsumeikan" in Chinese characters appear to tilt clockwise while those of "Psychology" counterclockwise.

Copyright Akiyoshi Kitaoka 2006 (August 7)


"Jastrow illusion of face"

The lower face appears to be larger than the upper one though they are identical in size.

Copyright Akiyoshi Kitaoka 2006 (August 4)


"Head height illusion"

The height of the head appears to be the larges in the rightmost image, though all images have the same head height.

Copyright Akiyoshi Kitaoka 2006 (August 2)


"Industrial property"

The upper two and the lower two rows of Chinese characters appear to tilt clockwise while the middle one counterclockwise.

Copyright Akiyoshi Kitaoka 2006 (July 22)


"Teigijo Ritsumeikan"

The upper two and the lower two rows of Chinese characters appear to tilt counterclockwise while the middle one clockwise.

Copyright Akiyoshi Kitaoka 2006 (July 22)


"Displays"

In each row black faces are actually aligned horizontally but the second and the fourth ones appear to be located upper than the others. Moreover, the second and fourth ones appear to move upward.

Copyright Akiyoshi Kitaoka 2006 (July 18)

cf.
Anstis S M, Rogers B J, 1975 gIllusory reversal of visual depth and movement during changes of contrasth Vision Research 15 957-961
Gregory R L, Heard P F, 1983 gVisual dissociations of movement, position, and stereo depthh Quarterly Journal of Experimental Psychology 35A 217-237
Kitaoka, A. (2006) Configurational coincidence among six phenomena: A comment on van Lier and Csathó (2006). Perception, 35, 799-806.


"Eye movements"

'Eyes' are aligned vertically but the columns appear to tilt clockwise or counterclockwise alternately.

Copyright Akiyoshi Kitaoka 2006 (July 15)

This tilt illusion is the Popple illusion or the phase-shift illusion.


Classic geometrical illusion 4

Classic geometrical illusion 3

Classic geometrical illusion 2

Classic geometrical illusion 1


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