a demo of reverse phi movement (Anstis, 1970) Rings appear to rotate to and fro according to the change in luminance, though black or white arcs are stationary.pic.twitter.com/tOHYka6v3P
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Rings appear to rotate counterclockwise. (optimized Fraser-Wilcox, Type IIa) (Kitaoka, 2017) Kitaoka, A. (2017). The Fraser-Wilcox illusion and its extension. A. G. Shapiro and D. Todorović (Eds.), The Oxford Compendium of Visual Illusions, Oxford University Press, pp. 500-511.pic.twitter.com/ERJSpD4jyD
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