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The Impact of Systematic Variation of Cognitive Demand on Drivers' Visual Attention across Multiple Age Groups

Recordings of drivers' gaze under three levels of cognitive demand were captured under actual driving conditions in individuals in their 20's, 40's and 60's. Changes in the allocation of visual attention between single-task driving and the three levels of cognitive secondary tasks are summarized. Under the conditions studied here, gaze centralization varies by task difficulty and appears predominantly in the horizontal plane. The degree of horizontal gaze centralization with added cognitive workload is not related to age in the relatively healthy individuals studied.