Accession Number : AD0757647

Title :   Foveal Brightness Discrimination with Multiple Increments as a Function of Time Between Successive Increments.

Descriptive Note : Phase rept.,

Corporate Author : NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA CREW SYSTEMS DEPT

Personal Author(s) : Herrick,Robert M.

Report Date : 22 JAN 1973

Pagination or Media Count : 70

Abstract : In many naval weapons systems, information is provided in the mode of visual displays. In some displays a momentary increase in the intensity of a spot of light serves as a signal to an observer. The increased intensity of the spot may be repeated a number of times, and the observer's job is to detect the signal in the background of visual 'noise'. The visual variables of interest in such displays are the background luminance, the duration of the 'pip' of increased intensity, the time between successive pips, the number of repetitions, and the total observation time. All of these variables have been investigated in the present study. Simple empirical laws have been derived to describe the influence of the variables and the interactions among the variables. (Author Modified Abstract)

Descriptors :   (*VISUAL PERCEPTION, DISPLAY SYSTEMS), (*DISPLAY SYSTEMS, BRIGHTNESS), THRESHOLDS(PHYSIOLOGY), LIGHT, INTENSITY, PSYCHOPHYSIOLOGY

Subject Categories : Psychology
      Anatomy and Physiology
      Human Factors Engineering & Man Machine System

Distribution Statement : APPROVED FOR PUBLIC RELEASE