This is good. Or maybe it’s bad
Either way, perhaps @AkiyoshiKitaoka can explain why it is doing what it’s doing. It works the same way regardless of the orientation, so it must have to do with the rotation direction alone. But why?https://twitter.com/jagarikin/status/1229954803603689473 …
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Thank you, Kitaoka-san. I'll read through those. I'm curious to understand why the anti-clockwise rotating ring appears to get bigger, while the clockwise one gets smaller. Is there a simple reason why changing rotation direction changes the sign of the "magnification illusion"?
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I think because motion affects the perceived position of objects. cf. flash lag effect
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I believe Stuart Anstis proposed this phenomenon first. Anstis S M, 1970 "Phi movement as a subtraction process'' Vision Research,10, 1411-1430 Anstis S M, Rogers B J, 1975 "Illusory reversal of visual depth and movement during changes of contrast' 'Vision Research159, 57-96
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But many researchers prefer to cite Richard Gregory. Gregory R L, Heard P F, 1983 "Visual dissociations of movement, position, and stereo depth" Quarterly Journal of Experimental Psychology, A, 352, 17-23.
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