Perceptual visual workload as a function of static visual noise level during car driving


Type de document
Résumé / Abstract
For a long time, the peripheral vision in car driving was assigned to lane keeping and control of environmental dynamics elements (speed, road-users proximity...). Yet, this task is also characterized by a subtle sign discrimination often embedded among visual noise sources which can impair efficiency of the functional field of vision. The aim of this study is to compare road journeys, selected according to the complexity of their environment (more or less advertisement) in terms of the functional field of static vision (ffsv), components of the functional field of dynamic vision (ffdv) (duration, ocular fixation frequency, scanning interfixation) and the localization of fixations on the environment. These fields of view are evaluated in the real driving situation through a task involving the direction of spots of light randomly projected on the windscreen combined with simultaneous recording of eye movements by oculometer (eye marker recorder v). The main results obtained tend to indicate a lessening of drivers' visual perceptual capacities in function of the complexity of the road environment. More particularly, a lowering of ffsv occurs in built-up areas, together with the modulations of which suggest a limited search of the environment. This method of investigating drivers' functional fields of view to complement visual strategy analysis is likely to further our knowledge, regarding visual perceptual capacities and processes of information capture and processing in driving situation.

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