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From: Motion processing with two eyes in three dimensions
Journal of Vision. 2011;11(2):10. doi: / Figure Legend: Naive observer 2AFC results for plaids and pseudoplaids. (A) Three-dimensional direction discrimination accuracy resulting from viewing oppositely moving Type I plaids in the two eyes for 3 naive (and 1 expert) observers. Formatting as for Figures 5A, 2, and 3. Symbols above the upper x-axis indicate predicted location of peak discrimination accuracy, based on either component motion (±60 deg; gray ticks) or pattern motion (0 deg; red solid triangle). Best fit to the data (0.1 deg, 95% confidence interval, [−3, 4] deg; open black triangle) indicates a dependence of accuracy on the plaid pattern motion direction. (B) Three-dimensional direction discrimination accuracy resulting from viewing oppositely moving Type II plaids in the two eyes for 3 naive (and 1 expert) observers. Formatting as above. Symbols above the upper x-axis indicate predicted location of peak discrimination accuracy, based on either component motion (vector average 5.1 deg; blue solid triangle) or pattern motion (intersection of constraints (IOC) 51.2 deg; red solid triangle). The fitted peak of the perceptual tuning curve fell at 16.1 deg (black open triangle above plot; bounding 95% confidence interval, [12, 20] deg). (C) Three-dimensional direction discrimination accuracy resulting from viewing the 2-component pseudoplaid stimulus for 3 naive (and 1 expert) observers. Formatting as above. Three-dimensional motion direction discrimination accuracy depended on global pattern motion direction, even when individual stimulus elements were spaced so that the classical receptive field of a V1 only received input from one of the eyes. Peak accuracy at 1.1 deg (95% confidence interval on fitted peak location, [−1, 8] deg). (D) Three-dimensional direction discrimination accuracy resulting from viewing the multi-component pseudoplaid stimulus for 3 naive (and 1 expert) observers. Formatting as above. Three-dimensional motion direction discrimination accuracy depended on global pattern direction, even when individual stimulus elements were randomly oriented, with the constraint that each individual element's motion was compatible with a single global pattern motion direction (otherwise identical to the 2-component pseudoplaid). Peak at 0.3 deg (95% confidence interval on fitted peak location, [−7, 7] deg). Date of download: 11/6/2017 The Association for Research in Vision and Ophthalmology Copyright © All rights reserved.
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