Abstract

Vorticity discrimination for a rotating annulus is affected by the presence of an interfering randomly rotating concentric annulus whenever the radii differ by less than 20%. This interaction is interpreted in terms of an activity of local motion detectors that scale linearly in size with the tuning velocity. The speed of a rotating annulus is perceived as being less in the presence of a moving interfering annulus than in the presence of a static annulus. Furthermore, the speed of a rotating annulus is perceived as being greater in the presence of a static interfering annulus than without an interfering annulus.

© 1990 Optical Society of America

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