Abstract
The magnitude of the Zollner illusion varies according to the angle of intersect between the test and inducing lines and is maximal at about 20 deg of intersect angle. Increasing the density of the inducing lines multiplies the illusion by a constant amount. Obtained error functions agree well with error functions derived according to Piaget’s law of relative centrations.
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The author thanks Barry Kirkwood for his valuable comments.
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White, K.G. Zöllner illusion as perceptual enlargement of acute angle. Psychon Sci 24, 73–75 (1971). https://doi.org/10.3758/BF03337899
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DOI: https://doi.org/10.3758/BF03337899