The image appears to rotate counterclockwise.pic.twitter.com/i2XKgAZbK4
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Ref. 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/wVm16PaQRG
Woah... it is the opposite for me! It is ACW, and the 2nd one is CW!!!
And yes, I know how a clock turns!
Clockwise, but not if looked at directly. It rotates only with peripheral vision. I have to look to one side of it. But it works on all four sides...
Both clockwise and it's hard to see the effect. Center moves left to right
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