Accession Number : AD0619507

Title :   VISUAL SEARCH EXPERIMENTS: ACUITY, RESPONSE TIME, NOISE PERSISTENCE.

Descriptive Note : Technical rept. for Feb-Sep 64,

Corporate Author : NAVAL ORDNANCE TEST STATION CHINA LAKE CALIF

Personal Author(s) : Erickson,Ronal A.

Report Date : 02 JUL 1965

Pagination or Media Count : 52

Abstract : This experiment demonstrated the degradation in search performance resulting from a decrease in the frame rate of a static, structured display containing television-type visual 'noise'. The display was produced by projecting moving pictures of the static, structured scene; the noise in the scene was obtained by the double exposure and special printing of the film. Results indicate that restricted usefulness of a low frame rate, television-type display may be expected in a low signal-to-noise ratio condition. Neither peripheral and foveal acuity nor eye dominance scores correlated significantly with search time. There was a significant correlation between response time and search time; this is attributed to the mental image processing and decision time common to both tasks. (Author)

Descriptors :   (*VISUAL ACUITY, TARGET DISCRIMINATION), (*TARGET DISCRIMINATION, VISUAL ACUITY), EYE, PERFORMANCE(HUMAN), REACTION(PSYCHOLOGY), REFLEXES, NOISE, VISUAL SIGNALS, TELEVISION DISPLAY SYSTEMS, SCREENS(DISPLAYS), BRIGHTNESS, CORRELATION TECHNIQUES, ANALYSIS OF VARIANCE

Distribution Statement : APPROVED FOR PUBLIC RELEASE