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Failure of direction discrimination at detection threshold for both fast and slow chromatic motion
1998
Optical Society of America. Journal A: Optics, Image Science, and Vision
Separate pathways have recently been proposed for "fast" and "slow" motion, whose properties differ in the way that color contrast is processed [see Nature (London) 367, 268 (1994); Trends Neurosci. 19, 394 (1966); and Vision Res. 36, 1281) and 35, 1547]. One reported difference is that for slow motion the direction of chromatic stimuli cannot be determined at detection threshold, whereas at higher temporal rates detection and direction discrimination threshold coincide. Using a carefully
doi:10.1364/josaa.15.002945
fatcat:tlmionmhtjeivgvrnkg5zn3udi