Hs. Chan et Aj. Courtney, VISUAL PERFORMANCE ON SYNCHRONOUS AND ASYNCHRONOUS PERIPHERAL TARGET DETECTION TASKS, Human factors and ergonomics in manufacturing, 7(3), 1997, pp. 197-210
Horizontal visual lobe boundaries were measured for a peripheral targe
t detection task using synchronous and asynchronous target presentatio
n. The peripheral target was presented either at the beginning or end
of stimulus presentation at one of three different target exposure dur
ations for asynchronous presentation. Correct responses for the synchr
onous presentation were found to be much lower than that for the async
hronous one. With asynchronous presentation, exposure duration was imp
ortant but not directly related to detection performance. Instead, tim
ing of onset or offset of the target during presentation was found to
affect detection performance. The results show that it is not appropri
ate to generalize the results of visual lobe tests obtained at static
condition for visual search tasks containing dynamic content. (C) 1997
John Wiley & Sons, Inc.