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Color and luminance: Independent frequency shifts.

Examined the relation between chrominance channels and ocular dominance with respect to chromatic spatial frequency shift. In 2 experiments, human observers were exposed monocularly to red-green or black-white square-wave gratings. In Exp I with 4 experienced Ss, simultaneous opposite independent chromatic and achromatic spatial frequency shifts were obtained. Interocular transfer was found in the achromatic test only. In Exp II, 24 naive Ss were tested binocularly with each of the shifts induced alone. The shifts obtained in the opposing condition did not differ from those obtained in the simple condition. The results indicate the existence of pure chrominance channels tuned to spatial frequency. Chrominance and luminance channels in the visual system seem to perform similar but separate spatial frequency analyses. (PsycINFO Database Record (c) 2007 APA, all rights reserved)



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