Title: Additivity failure of chromatic valence in the opponent‐color theory
Abstract:Abstract The additivity of flicker responses produced by two different wavelengths λ 1 and λ 2 was investigated for five adapting levels of 560 nm by the summation‐index method. A summation‐index valu...Abstract The additivity of flicker responses produced by two different wavelengths λ 1 and λ 2 was investigated for five adapting levels of 560 nm by the summation‐index method. A summation‐index value of σ of 0.30 was obtained for all conditions employed, confirming the linear property of the achromatic channel. The additivity of unique chromatic responses, red, yellow, green, and blue, was also investigated with the same method. In this case the wavelengths λ 1 and λ 2 were chosen in a spectral region to produce one of the four unique colors and the summation index was measured for the color with the cancellation method. A summation index of 0.30 was found for the green and blue sensations and also for the red sensation if both stimuli were from the same spectral region. A slight additivity failure of the enhancement type was found for pairs λ 1 and λ 2 λ 1 was in the short‐wavelength region while λ 2 was in the long‐wavelength region. An additivity failure of the same type was found for the yellow chromatic sensation when λ 2 was 607 nm and λ 1 was 570, 550, or 533 nm, the last combination giving a summation index of as much as 0.64. The results imply the existence of two different cones whose responses do not add linearly to yield the yellow sensation.Read More
Publication Year: 1982
Publication Date: 1982-06-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 4
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