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A text-book of experimental psychology.On visual sensations (concluded).

A text-book of experimental psychology.: On visual sensations (concluded). The Young-Helmholtz Theory of Colour Vision.—The Young-Helmholtz theory, first proposed by Thomas Young and later advanced by Clerk Maxwell and especially by Helmholtz, rests on the sufficiency of three standard colours, variously combined, to produce colourless and all colour sensations (page 78). It was first supposed that three distinct sets of nerve fibres exist, each of which is specially sensitive to waves of a certain length. But in the more modern form of the theory, the three sets of nerve fibres are usually replaced by three photochemical substances ; and it is supposed that the first apparatus is most sensitive to a carmine red, i.e., a red bluer than the extreme red of the spectrum, that the second is most sensitive to a slightly yellowish green, and that the third apparatus is most sensitive to an ultramarine blue. All colour stimuli are considered to act on all three systems of apparatus, but in different degrees; red colours acting most on the first, least on the last, blue colours acting most on the last and least on the first, while both these colours act, less strongly than green, on the second apparatus. The sensation produced depends on the relative extent to which the three systems of apparatus are stimulated. Hering's Theory of Colour Vision.—Hering's theory is based (i.) upon the seemingly "elementary" nature of red, yellow, green, blue, white, and black, when all the possible visual sensations are carefully considered by introspection, and (ii.) upon the relation of the complementary colours to one another. He assumes that there are two elementary systems, one of which gives rise to red and green, the other to yellow and blue sensations, and that there is a third apparatus, excitation of which gives rise to the colourless series of sensations. According to this theory, the physiological actions of a colour stimulus and of its complementary colour stimulus are antagonistic. (PsycInfo Database Record (c) 2023 APA, all rights reserved) http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

A text-book of experimental psychology.On visual sensations (concluded).

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Publisher
Longmans, Green and Co
Copyright
Copyright © 1909 American Psychological Association
Pages
92 –107
DOI
10.1037/13628-007
Publisher site
See Chapter on Publisher Site

Abstract

The Young-Helmholtz Theory of Colour Vision.—The Young-Helmholtz theory, first proposed by Thomas Young and later advanced by Clerk Maxwell and especially by Helmholtz, rests on the sufficiency of three standard colours, variously combined, to produce colourless and all colour sensations (page 78). It was first supposed that three distinct sets of nerve fibres exist, each of which is specially sensitive to waves of a certain length. But in the more modern form of the theory, the three sets of nerve fibres are usually replaced by three photochemical substances ; and it is supposed that the first apparatus is most sensitive to a carmine red, i.e., a red bluer than the extreme red of the spectrum, that the second is most sensitive to a slightly yellowish green, and that the third apparatus is most sensitive to an ultramarine blue. All colour stimuli are considered to act on all three systems of apparatus, but in different degrees; red colours acting most on the first, least on the last, blue colours acting most on the last and least on the first, while both these colours act, less strongly than green, on the second apparatus. The sensation produced depends on the relative extent to which the three systems of apparatus are stimulated. Hering's Theory of Colour Vision.—Hering's theory is based (i.) upon the seemingly "elementary" nature of red, yellow, green, blue, white, and black, when all the possible visual sensations are carefully considered by introspection, and (ii.) upon the relation of the complementary colours to one another. He assumes that there are two elementary systems, one of which gives rise to red and green, the other to yellow and blue sensations, and that there is a third apparatus, excitation of which gives rise to the colourless series of sensations. According to this theory, the physiological actions of a colour stimulus and of its complementary colour stimulus are antagonistic. (PsycInfo Database Record (c) 2023 APA, all rights reserved)

Published: Feb 13, 2012

Keywords: visual sensations; standard colors; complementary colors; Young-Helmholtz theory; color stimulus; color sensations; Thomas Young; nerve fibres; Clerk Maxwell; Hering theory of color vision

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