· Contributors · Organizations ·
Effects of Spatial Uncertainty on Auditory Vigilance Performance and Cerebral Hemodynamics
LocationGrand Salon I
DescriptionThe current study is investigating the possibility that spatial uncertainty may increase the severity of the vigilance decrement and increase workload compared to spatial certainty in spatial auditory displays. Observers monitor an auditory display where critical signals for detection are shorter in duration. However, these signals sound from speakers in either a consistent pattern (spatial certainty) or an inconsistent pattern (spatial uncertainty). Cerebral blood flow velocity is being employed as a measure of task-related workload. We predict that spatial uncertainty, rather than spatial certainty, in auditory vigilance will increase workload and the severity of the vigilance decrement. Thus, we expect that the deployment of 3-D auditory displays which employ spatial certainty will be beneficial in operational settings requiring vigilance.