Memory Effects in Visual Search: The Graticule
MICHIGAN UNIV ANN ARBOR HUMAN PERFORMANCE CENTER
Pagination or Media Count:
In a graticular visual search task, one in which the stimuli in the visual field remain fixed in position from trial to trial and search is required for different targets each time, the subject has the opportunity to improve his performance as he learns where to look for particular targets. A series of five experiments supported the conclusions for both letter targets or arbitrary symbols that 1 grouping stimuli in natural arrangements on the display improves speed and accuracy of target location over no distinctive grouping 2 this improvement can be attributed at least in part to improved memory for the graticule, the stored representation of the display and 3 the characteristics of graticular search are significant in the design of control panels in which an array of buttons are present and the subject must select an appropriate response.