Discrimination of crossed and uncrossed disparities

Tanner's theory of recognition [J. Acoust. Soc. Am. 28, 882 (1956)] was applied to the discrimination of retinal disparity stimuli for both diplopic and fused images. The results for diplopic stereopsis suggest a two-channel model with separate encoding of crossed and uncrossed disparities, similar to the model proposed by Richards [Exp. Brain Res. 10, 308 (1970)]. For fused images the results were consistent with a multichannel model with overlapping disparity sensitivities.