Accession Number : AD0639143

Title :   THE SPEED AND ACCURACY OF DISCRIMINATING DIFFERENCES IN HUE, BRILLANCE, AREA, AND SHAPE.

Descriptive Note : Technical rept.

Corporate Author : MOUNT HOLYOKE COLL SOUTH HADLEY MASS PSYCHOPHYSICAL RESEARCH UNIT

Personal Author(s) : Reed,J. B.

Report Date : SEP 1951

Pagination or Media Count : 31

Abstract : CONCLUSIONS: People can discriminate differences in hue and in shape faster and more accurately than differences in area or in brilliance. On any visual display, therefore, the most important symbols should differ in hue or in shape. As the difference between two areas or two hues is increased, discrimination time is decreased. After a while, increasing the difference between two hues or two areas has no effect on discrimination time. That is, this time gradually approaches a constant discrimination time for both aspects. This constant discrimination time seems to be the same whether we are discriminating hue differences or shape differences. Therefore, the time required to discriminate very large stimulus differences may be the same no matter what aspect we are looking at. (Author)

Descriptors :   (*VISUAL SIGNALS, CODING), (*HUMAN FACTORS ENGINEERING, VISUAL SIGNALS), VISUAL PERCEPTION, COLORS, GEOMETRIC FORMS, CLASSIFICATION

Subject Categories : Psychology
      Human Factors Engineering & Man Machine System

Distribution Statement : APPROVED FOR PUBLIC RELEASE