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The purpose of this protocol is to assess the risk of drowsy driving amongst shift workers using objective measures of drowsiness and driving performance in an instrumented research vehicle.
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Specific Aim 1. To test the hypothesis that on road (track) driving performance will deteriorate (variation in lateral lane position and the rate of out of lane driving events) and the frequency of episodes of severe sleepiness will increase ("microsleeps" on EEG and Johns' Drowsiness Score >4) in shift workers following an extended work shift or night shift compared to a rested state, following day shifts.
Specific Aim 2. To test the hypothesis that ocular measures of alertness (percent of time with eyes closed, eye tracking and Johns' Drowsiness Score) are related to abnormal driving performance (driving out of the lane) and "microsleeps" during on road (track) driving.
Specific Aim 2a. To test the hypothesis that autonomic measures, ECG, respiration (measured with the Bioharness), skin conductance level and peripheral blood flow (measured with the Q sensor), are related to abnormal driving performance (driving out of the lane) and "microsleeps" during on road (track) driving
Specific Aim 3. To test the hypothesis that self-reported sleepiness is related to on road (track) driving performance and episodes of severe sleepiness following extended working shifts or night shifts.
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Exclusion Criteria: Exclusion criteria includes all parameters outside the inclusion criteria above.
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