JAPANESE STUDIES ON THE SO-CALLED GEOMETRICAL-OPTICAL ILLUSIONS

Abstract

"Some geometrical figures appear to be distorted in such fashion that figural elements attract each other… . Some geometrical figures appear to expand as a whole… . Some geometrical illusions in direction, straightness or size are hardly attributed to the displacement or the change of location of the points which constitute the illusional figures… . Illusions in angle or direction generally are greater in the oblique orientation than in the vertical or horizontal direction. The vertical length is overestimated more than the horizontal length. There are intimate kinships between the geometrical illusions and the figural after-effects." (83 ref.) (PsycINFO Database Record (c) 2012 APA, all rights reserved)