perceptual constancy

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The tendency for a perceived object or a perceptual quality to appear the same when the pattern of sensory stimulation or proximal stimulus alters through a change in orientation, distance, illumination, or some other extraneous influence or factor. See colour constancy, lightness constancy, melodic constancy, object constancy, odour constancy, person constancy, position constancy, shape constancy, size constancy, velocity constancy, word constancy. See also Brunswik ratio, Land effect, phenomenal regression, retinex theory, shape-slant invariance, template matching, Thouless ratio.

Subjects: Psychology.

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