Rings appear to rotate clockwise, though they actually rotate counterclockwise. (a demo of "reversed phi" produced with phenomenal phenomena)pic.twitter.com/NyfTd12eAl
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Rings appear to rotate clockwise, though they actually rotate counterclockwise. (a demo of "reversed phi" produced with phenomenal phenomena) (changes in the background luminance)pic.twitter.com/BQSBTebXZL
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"Reversed phi and related motion phenomena" http://www.psy.ritsumei.ac.jp/~akitaoka/reversephi.html …
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楕円に色を付けると、実際の回転方向(反時計回り)がわかるからか、錯視的回転(時計回り)の知覚の邪魔になるようです。色が一周しないのは、作るのが大変だったからです。この動画は20枚でできていますが、30度分の回転で20枚だから、全部で240枚必要なのです。マスクは2つで十分らしいのに。pic.twitter.com/hInMAieXdG
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画像は小さい方がこの運動錯視効果は強いので、小さい画像をポストしたら、ツイッターでは拡大されるらしく、ジャギーになったので、大きい画像(横幅1200ピクセル)も置いておきます。pic.twitter.com/m4RN6jkqOs
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Replying to @AkiyoshiKitaoka
I did some psychophysics using similar stimuli during my PhD. I found that the switch from perception of phi to beta is controlled by cortical spacing (crowding). Makes sense that coloring one element differently would allow an escape from crowding. http://crowding.github.io/thesis/
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Great! I saw that before. "For most observers, the wheel on the right always appears to rotate clockwise," http://crowding.github.io/thesis/ ---> maybe counterclockwise
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