「不気味なフレーザー錯視」 Rows are aligned horizontally, but the uppermost and third ones appear to tilt counterclockwise while the rest clockwise.pic.twitter.com/X3IpYUaK5v
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Fraser, J. (1908) A new visual illusion of direction. British Journal of Psychology, 2, 307-320.
Do you see Fraser's spiral? Concentric circles appear to be spirals.pic.twitter.com/rxieIO1mbj
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