Accession Number : AD0720800

Title :   An Experimental Investigation of the Effect of Target Motion on Visual Detection,

Corporate Author : RAND CORP SANTA MONICA CALIF

Personal Author(s) : Dugas,D. J. ; Petersen,H. E.

Report Date : FEB 1971

Pagination or Media Count : 44

Abstract : The document reports an experiment comparing the detection probabilities for moving targets against complex backgrounds; compares the results to the Bailey model for detection of static targets in random search (see RM-6158); and extends that model to cover moving targets by modifying Bailey's glimpse-aperture factor to reflect the fact that a moving target is 2 to 8 times as easily found as a static one. For an aerial-photograph background, the improvement was about 4 times. In the experiment, seven subjects viewed a television display of an artificial, electronically generated target at two speeds against an aerial photo of wooded terrain, against felt, and against a grid. Results suggest--but do not prove--that it is not the motion itself that improves detection performance, but the contrast changes that occur as the target moves over a complex background. (Author)

Descriptors :   (*VISUAL PERCEPTION, TARGETS), (*TARGETS, DETECTION), MOTION, PROBABILITY, BACKGROUND, PREDICTIONS, AERIAL TARGETS

Subject Categories : Psychology

Distribution Statement : APPROVED FOR PUBLIC RELEASE