Accession Number : AD0448468


Title :   VISUAL SEARCH FOR TARGETS: LABORATORY EXPERIMENTS,


Corporate Author : NAVAL ORDNANCE TEST STATION CHINA LAKE CA


Personal Author(s) : Erickson, Ronald A


Report Date : Oct 1964


Pagination or Media Count : 8


Abstract : In laboratory experiments conducted at NOTS, visual search performance of 16 male subjects was measured and related to display- and observerdependent parameters. Several facts emerged: a significant correlation exists between peripheral visual acuity scores and search-time scores for a search task in a static field. This correlation is dependent upon the angle of the visual axis at which acuity is measured and the number of objects in the field being searched. When the field is moving with respect to the subject, search performance decreases when the velocity of the field increases. Comparison of data from the static search experiment with that from the dynamic experiment indicates that this perfomance degradation is due to a time limitation and not to motion per se. Further, with velocity increase, foveal acuity becomes more important than peripheral acuity in the search task. Search time is proportional to the number of objects in the display, and introduction of a linear cue into the display greatly decreases search time. (Author)


Descriptors :   *TARGET RECOGNITION , SEARCH THEORY , VISUAL ACUITY , DISPLAY SYSTEMS , TIME STUDIES , VISUAL PERCEPTION , TARGET DISCRIMINATION , TEST METHODS , CORRELATION TECHNIQUES , LEARNING , EXPERIMENTAL DATA , PSYCHOLOGICAL TESTS


Distribution Statement : APPROVED FOR PUBLIC RELEASE