2017 Volume 56 Issue 4 Pages 322-326
We can know better about human vision as a result of revealing unknown mechanisms of various visual illusions. We can see rotation in the Fraser-Wilcox motion illusion. We focused on analysis of the rotating mechanism which can explain the reverse motion against the direction suggested by the conventional explanation for the Fraser-Wilcox motion illusion. In this study, we used arrowhead pattern, which shows us opposite motion direction against the direction predicted by the conventional explanation. The direction of rotation supposed for the quasi-arrowhead parts in the Fraser-Wilcox pattern is opposite against the motion direction explained by the conventional explanation. This result suggest us that there could be different two rotation mechanisms for explaining bi-direction rotation in the Fraser-Wilcox motion illusion;one is conventional explanation based on contrast effect and the other is our new explanation based on arrowhead pattern effect.