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Motion processing by chromatic and achromatic visual pathways

Seven experiments with 3 Ss examined a family of stimuli (colored bars of different orientations) capable of isolating directional spatiotemporal information extracted from oriented luminance clues, nonoriented chromatic + luminance clues, or pure chromatic clues. Findings indicate that motion perception could be elicited by any of the clues; however, motion perception elicited by nonoriented chromatic clues was stronger than that elicited by oriented luminance clues. Under equiluminant conditions, motion information was extracted only poorly across different colors. Results suggest that color, motion, and shape are processed simultaneously at lower stages. (PsycINFO Database Record (c) 2005 APA, all rights reserved)



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