a demo of reverse phi movement (Anstis, 1970) (thinner arcs) Rings appear to rotate to and fro according to the change in luminance, though black or white arcs are stationary.pic.twitter.com/OT5nY3KvHE
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Rogers, B., Anstis, S., Ashida, H., and Kitaoka, A. (2019). Reversed phi and the “phenomenal phenomena” revisited. i-Perception, 10 (4), 1–22. doi:10.1177/2041669519856906
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a demo of 'phenomenal phenomena' (Gregory and Heard, 1983) Rings appear to rotate to and fro according to the change in luminance, though black or white arcs are stationary.pic.twitter.com/no41QayyRk
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a (standard) demo of 'phenomenal phenomena' (Gregory and Heard, 1983) Rings appear to rotate to and fro according to the change in luminance, though black or white arcs are stationary.pic.twitter.com/3CU8DKuYLM
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a demo of 'phi movement' (Anstis and Rogers, 1975) Rings appear to rotate to and fro according to the change in luminance, though black ellipses are stationary.pic.twitter.com/pxiEXWjmZg
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Anstis, S. M. & Rogers, B. J. (1975). Illusory reversal of visual depth and movement during changes of contrast. Vision Research, 15, 957-961.
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Figure 1 Kitaoka, A. (2006). Configurational coincidence among six phenomena: A comment on van Lier and Csathó (2006). Perception, 35, 799-806.pic.twitter.com/MOP6S4P7nY
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Four-stroke reversed phi motion: Rings appear to rotate to and fro, though black or white arcs are stationary.pic.twitter.com/UHdZE2Ai8h
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Two-stroke reversed phi motion: Rings appear to rotate to and fro.pic.twitter.com/ATX7kIfJow
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A demo of possibly four-stroke reversed phi motion: Rings appear to rotate clockwise, though this movie consists of only four images.pic.twitter.com/qOwsSubmXS
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cf. Takeuchi, T. (1997) The motion analogue of the cafe wall illusion. Perception, 26, 569-584.
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