Hs. Chan et Aj. Courtney, EFFECTS OF PRIORITY ASSIGNMENT OF ATTENTIONAL RESOURCES, ORDER OF TESTING, AND RESPONSE SEQUENCE ON TUNNEL VISION, Perceptual and motor skills, 78(3), 1994, pp. 899-914
The effects of relative priority of attentional resources allocated to
simultaneous peripheral and foveal tasks, response sequence to the ta
sks, and order of testing with two levels of foveal cognitive loading
on tunnel vision were studied with 32 Chinese undergraduates. Two leve
ls of foveal condition were used for the foveal task while the periphe
ral task required a single-target detection. Performance decrement val
ue and a significant interaction of levels x eccentricities indicated
that tunnel vision was most prominent when the foveal task was primary
. Greater magnitude of tunnel vision was obtained when the more diffic
ult foveal task was tested prior to the no-foveal-load condition. Resp
onding sequence to the tasks was nonsignificant.