Elsevier

Vision Research

Volume 33, Issue 10, July 1993, Pages 1437-1446
Vision Research

Illusory motion of texture boundaries

https://doi.org/10.1016/0042-6989(93)90050-7Get rights and content

Abstract

We have measured the perceived direction of motion of rigid patterns containing texture boundaries at various orientations. Texture boundaries are defined here as the locus of 180° phase shifts in a square-wave grating. When these patterns are moved parallel to the orientation of the grating, the perceived direction of motion in foveal viewing differs by as much as 45° from the true direction of rigid motion as defined by the intersection of constraints (IOC) construction. At 8.0° in the periphery the perceived direction was closer to the true direction of rigid motion. Thus, the peripheral visual system analyzes motion of these stimuli more accurately than does the fovea. These results are consistent with a current model of motion analysis that combines responses of Fourier and non-Fourier motion pathways using a vector sum operation.

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