Visual search: eye movements and peripheral vision.
The visual search task allows investigation of the way in which central processes can influence the programming of saccadic eye movements. In this paper, a simple search task is studied in which a target is presented in a ring-shaped display of eight stimuli. The subject is required to locate the target with a saccadic eye movement. Targets were colored disks and the task was to search for a target of a particular color. Sensory factors (when all nontargets are identical, the target stands out) and central factor (prespecification of the target) both contribute to search efficiency. When the display contains a double target, saccades sometimes land at an intermediate position between the two targets. This shows that the signal delivered by the search procedure is not necessarily highly localized.
Department of Psychology, University of Durham, England.
J M
JM
Findlay
D000328:Adult; D003118:Color Perception / Q000502:physiology*; D005133:Eye Movements / Q000502:physiology*; D006801:Humans; D012438:Saccades / Q000502:physiology; D014785:Vision, Ocular / Q000502:physiology*