Accession Number : ADA323155

Title :   Redundant Coding in Visual Search Displays: Effects of Shape and Colour.

Descriptive Note : Technical rept.,

Corporate Author : DEFENCE AND CIVIL INST OF ENVIRONMENTAL MEDICINE DOWNSVIEW (ONTARIO)

Personal Author(s) : Bauer, Ben ; McFadden, Sharon

PDF Url : ADA323155

Report Date : FEB 1997

Pagination or Media Count : 30

Abstract : Subjects sought a unique target shape in a display of distractor shapes under three color coding conditions. In the no color coding condition (NC C) all shapes shared the same color. In the two color-coded conditions, the target was uniquely and redundantly color coded with a color whose CIE xy chromaticity coordinates were linearly separable (LS) or were not linearly separable (NLS) from the set of distractor chromaticity coordinates. Performance was optimal under LS coding, was reduced under NLS coding and was least efficient in the NCC condition. We discuss the implications of these results for refining color selection algorithms and for color coding in situations where the gamut of available colors is limited. In a secondary set of analyses, we note large performance differences as a function of target shape.

Descriptors :   *VISUAL PERCEPTION, *CHROMATICITY, *COLOR CODING, ALGORITHMS, SPATIAL DISTRIBUTION, PERFORMANCE(HUMAN), SHAPE, CANADA, ILLUMINATION, COLOR DISPLAYS, COMPUTER GRAPHICS, VISUAL TARGETS, VISUAL AIDS, VISUAL ACUITY, PSYCHOPHYSICS, COLOR VISION, CUES(STIMULI).

Subject Categories : Psychology
      Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE