Accession Number : AD0639144

Title :   THE SPEED AND ACCURACY OF DISCRIMINATING DIFFERENCES IN SINGLE AND COMPOUND ASPECTS OF VISION.

Descriptive Note : Human engineering rept.

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

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

Report Date : SEP 1952

Pagination or Media Count : 28

Abstract : CONCLUSIONS: People discriminate the compound hue and shape faster than any other compound, whether or not other aspects vary in a given group of symbols. Hue and area, and hue and brilliance require very little more discrimination time than hue and shape. It would seem that hue is an aspect that consistently forms compounds that are quickly discriminated. Compounds are, in general, discriminated more accurately than single aspects. This difference in accuracy, however, is too small to be significant. There is no evidence that compounds are discriminated significantly faster than single aspects. Good single aspects such as hue or shape would probably be better than a compound of two aspects (in ordinary coding situations). There are indications that the speed of discriminating a compound is determined by the speed of discriminating the faster of the two aspects in that compound. (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