The Kanizsa Illusion I

Stare at this figure until a white triangle appears in the center. The star is a "subjective" star. It is subject to the whim of the three"PACMAN" faces, since they define its shape, and its very existence.

Change the shape of the triangle by using the slider bar to open and close the "PACMANs" mouths.



Credits: Caetaro Zanizsa, Subjective Contours, Scientific American, April 1976.
Java Applet: 1998 Tony Azevedo

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