lavatory wall illusion

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A variant of the hollow squares illusion and the Münsterberg illusion, created by an alternating arrangement of square two-tone tiles, each changing smoothly from light to dark along one axis, the effect being that the tiles appear misaligned and non-parallel. It was first reported in 1987 by the English optometrists J(oy) Margaret Woodhouse (born 1948) and Stephen P(hilip) Taylor (born 1951), who reproduced a photograph of a bathroom decorated with such tiles. See also cafe wall illusion.

Subjects: Psychology.

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