Diameter Visual inspection of Figure 5B suggests the clarity of the illusory test ring rotation gradually diminished as the diameter of the rings increased, but the main effect of Diameter did not reach statistical significance, F (3, 33) = 2.99, p = .084, η p 2 = .213.
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The Ring Rotation Illusion: Properties and Links of a Novel Illusion of Motion.
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Diameter Mean clarity ratings trended downward when the ring diameter increased ( Figure 2B ), but this trend failed to reach statistical significance, F (3, 33) = 2.13, p = .121, η p 2 = .162.