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The cafe wall illusion, so called because the first time this illusion was spotted was ...
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This figure consists of squares, but appears to be wavy
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This is an optical illusion of relative size perception. By effect of assimilation, th...
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In this illusion, the rings appear to rotate when fixating on the centre and moving tow...
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The poggendorf illusion. The rectangle actually covers one straight line
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Compare the two tables in the neighbouring figure. How do size and shape of the two tab...
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Illusory contours as seen in the Kanizsa figure
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A Necker cube invisible to all known cortical mechanisms
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The Ponzo Illusion: most viewers perceive the uppermost horizontal line to be longer th...
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The Ponzo Illusion? Most viewers find that the illusion does not work when the middle l...
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The Judd Illusion: the right hand side of the horizontal line looks longer than the lef...
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The Muller-Lyer Illusion: the horizontal line in the bottom figure often appears longer...