Accession Number : AD0733918

Title :   Adaptation Level and Visual Space Perception.

Descriptive Note : Technical memo.,

Corporate Author : JOHNS HOPKINS UNIV BALTIMORE MD DEPT OF PSYCHOLOGY

Personal Author(s) : Avant,Lloyd L. ; Bevan,William

Report Date : SEP 1971

Pagination or Media Count : 30

Abstract : A review of evidence demonstrating influence of adaptation level in the perception of the various aspects of visual space is presented. The data clearly indicate that the simplest detection of a briefly presented stimulus depends upon the spatial, temporal and chromatic properties of its surround. The data also demonstrate that the perception of such basic properties of spatially arrayed stimuli as extensity, location, distance and spatial organization depends upon a perceptual norm for the property being considered. Studies of geometrical illusions suggest an account of illusory perception within the formal model of adaption level theory. The problem of determining what co ditions permit pooling of stimulus values to form adaptation levels is discussed. (Author)

Descriptors :   (*SPACE PERCEPTION, *ADJUSTMENT(PSYCHOLOGY)), VISUAL PERCEPTION, ILLUSIONS

Subject Categories : Psychology

Distribution Statement : APPROVED FOR PUBLIC RELEASE