Correlations between driving and psychomotor tasks
This study aimed to compare the effect of sleep deprivation on the driving tasks and the psychomotor test battery. High correlations between the tasks indicate a higher level of validity for the psychomotor test battery. Additionally, these correlations provide information on how sleep deprivation impairs driving performance. When assessing each set of measurements separately, none of the tasks were significantly correlated with the SDLP of the driving simulator, except for the smooth eye pursuit task at well-rested morning (For the effect of sleep deprivation, only a few of the correlations between the driving simulator, on-the-road driving, and psychomotor tasks were significant. Of the psychomotor tasks, the adaptive tracker showed a significant correlation with the driving simulator, but not for the on-the-road driving, for the effect of sleep deprivation (The test duration for both driving tasks was around 30 minutes. This made it possible to compare both tasks, but it does deviate from the standard length of the on-the-road tasks, which is 100 km [