Perceptual constancy

Subjective constancy or perceptual constancy is the perception of an object or quality as constant under changing conditions. Contents 1 Vision 2 Sound 3 Smell 4 Ver también 5 Referencias & Bibliografía 6 Textos clave 6.1 Libros 6.2 Papeles 7 Material adicional 7.1 Libros 7.2 Papeles 8 References Vision In vision this means perceiving a color as "constant under changing conditions of illumination" (Erickson 1975, p.11-12) y "is the achievement of a very complicated 'calculation' by an unconsciously working apparatus within our central nervous system" (Lorenz 1961, p.171).  "The facts behind color-constancy phenomena...are that we require fine color discriminations less frequently than gross discriminations, and when gross discriminations enable us to maintain focus on objects of prime interest, we 'systematically overlook' differences beyond the necessary degree of fineness. The mechanism which accomplishes this 'systematic overlooking' is the information-processing system of the organism, and the principle according to which it is accomplished is that this system never expands more of its capacity on a given perceptual task than is necessary according to the current needs and interests of the agent." (Sayre 1968, p.151-152) There are several types of perceptual constancies:- Object constancy Shape constancy Size contancy Colour constancy Brightness constancy Distance constancy Location constancy Roughness constancy Velocity constancy Sound In music, subjective constancy is the identification of a musical instrument as constant under changing timbre or "conditions of changing pitch and loudness, in different environments and with different players." (Erickson ibid) Melodic constancy Smell Odour constancy See also Object permanence Visual perception References & Bibliography Key texts Books Walsh, V. & Kulikowski, J.(1996). (Eds.), Perceptual Constancies: Why Things Look As They Do. Cambridge: Cambridge University Press. Papers Additional material Books Papers Google Scholar References Erickson, Robert (1975). Sound Structure in Music, Prensa de la Universidad de California. ISBN 0-520-02376-5. Lorenz, K. (1961). "The Role of Gestalt Perception in Animal and Human Behaviour" in Aspects of Form, p.157-178, Ed. Lancelot Law Whyte, Indiana University Press. Sayre, K.M. (1968). "Toward a Quantitative Model of Pattern Formation" in Philosophy and Cybernetics, p.149-152, Ed. Frederick J. Crosson and Kenneth M. Sayre, Simon and Schuster. Esta página utiliza contenido con licencia Creative Commons de Wikipedia (ver autores).

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