The latest works 17

Access since May 18, 2006


"Infinite staircase"

The width of the color ring is constant but appears to taper when seen clockwise. In addition, the ring appears to rotate clockwise.

Copyright Akiyoshi Kitaoka 2006 (June 13)

For the illusion of striped cords, see
Kitaoka, A. (1998). Apparent contraction of edge angles. Perception, 27, 1209-1219.

For the spiral illusion, see
Kitaoka, A., Pinna, B., and Brelstaff, G. (2001). New variations of spiral illusions. Perception, 30, 637-646.

For the optimized Fraser-Wilcox illusion, see
Murakami, I., Kitaoka, A. and Ashida, H. (2006) A positive correlation between fixation instability and the strength of illusory motion in a static display. Vision Research, 46, 2421-2431.
Conway, R. B., Kitaoka, A., Yazdanbakhsh, A., Pack, C. C., and Livingstone, M. S. (2005) Neural basis for a powerful static motion illusion. Journal of Neuroscience, 25, 5651-5656.
Backus, B. T., and Oruç, I. (2005). Illusory motion from change over time in the response to contrast and luminance. Journal of Vision, 5, 1055-1069.
Kitaoka, A. and Ashida, H. (2003) Phenomenal characteristics of the peripheral drift illusion. VISION (Journal of the Vision Society of Japan), 15, 261-262.


"Rotating spiral snakes"

Disks appear to rotate. In each disk, there appears to be spirals, though they are concentric circles.

Copyright Akiyoshi Kitaoka 2006 (June 7)


"Rotating op art"

The inner gray ring appears to rotate clockwise while the outer one clockwise.

Copyright Akiyoshi Kitaoka 2006 (June 5)


"Rotating snake pairs"

Each pair of snakes appears to rotate.

Copyright Akiyoshi Kitaoka 2006 (May 31)

Rotating snakes 4


"Rotating baby snakes"

Each disk appears to rotate.

Copyright Akiyoshi Kitaoka 2006 (May 30)

Rotating snakes 4


"Mushi-kun"*

*Mushi-kun = Mr. Worm

Each row of worms appears to move horizontally.

Copyright Akiyoshi Kitaoka 2006 (May 27)


"Expanding snakes"

Each disk appears to expand.

Copyright Akiyoshi Kitaoka 2006 (May 24)


"Four-leafed clovers"

Clovers appear to rotate a little.

Copyright Akiyoshi Kitaoka 2006 (May 23)

Rotational illusion 9


"Button creatures"

Buttons appears to move.

Copyright Akiyoshi Kitaoka 2006 (May 22)


"Sarunokoshikake"*

*Sarunokoshikake = a mushroom or a polypore

The image appears to expand.

Copyright Akiyoshi .Kitaoka 2006 (May 2)

Expansion and contraction 5


16 The latest works (May 2006 - May 2006)
15 The latest works (April 2006 - May 2006)
14 The latest works (March 2006 - April 2006)

13 The latest works (March 2006 - March 2006)
12 The latest works (February 2006 - February 2006)
11 The latest works (February 2006 - February 2006)
10 The latest works (January 2006 - February 2006)
9 The latest works (November 2005 - December 2005)
8 The latest works (October 2005 - October 2005)
7 The latest works (September 2005 - October 2005)
6 The latest works (June 2005 - August 2005)
5 The latest works (April 2005 - June 2005)
4 The latest works (March 2005 - April 2005)
3 The latest works (June 2004 - March 2005)
2 The latest works (April 2004 - June 2004)
1 The latest works (August 2003 - May 2004)
0 The latest works (June 2002 - July 2003)


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