title: Additivity of red chromatic valence.
abstract: The additivity of red chromatic valence was investigated by the hue cancellation method for 4 normal observers. Additivity held for wavelength combinations of 610-680 nm and 400-440 nm. When using 400-680 nm, additivity failure of enhancement type was found for two observers, reduction type failure for a third, and additivity, for a forth. The results suggest a nonlinear property of the red-green process for some observers and are discussed in terms of the contribution of B-cones to the process.
mesh_terms: D000221:Adaptation, Ocular; D000328:Adult; D003118:Color Perception / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D010786:Photoreceptor Cells / Q000502:physiology; D013053:Spectrophotometry