From: Complex interactions between spatial, orientation, and motion cues for biological motion perception across visual space Journal of Vision. 2013;13(2):8. doi:10.1167/13.2.8 Figure Legend: Stimuli and results discriminating forward/backward walking direction in Experiment 1. (a) Schematic illustration of walkers with and without orientation signals. The circular outlines are meant for illustrative purposes to make apparent the sequence of postures defined by spatial cues. Contrast was also enhanced for illustration. Red arrows indicate the antagonistic local 2-D motion vectors drifting in the direction opposite to global disk movement. For demonstration of Gabor stimulus with local motion scalar = 2.5, see Movie 1. The diagram in the lower panel illustrates the difference between 2-D biological motion vectors and the 1D motion vectors that determined the actual drifting speeds of individual gratings. (b) and (c) Mean proportion of responses consistent with the spatially defined direction as a function of the amount of antagonistic local motion, with psychometric fits. Error bars represent SEM. Date of download: 10/15/2017 The Association for Research in Vision and Ophthalmology Copyright © 2017. All rights reserved.