EVALUATION OF TECHNIQUES FOR OCULAR MEASUREMENT AS AN INDEX OF FATIGUE AND THE BASIS FOR ALERTNESS MANAGEMENT

David F. Dinges · Melissa M. Mallis · Greg Maislin

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Sleep and Work-Related Fatigue Human-Automation Interaction and Safety Mind wandering and attention

Abstract

This final report establishes the scientific validity of the ocular measure as a generally useful and reliable index of lapses in visual attention, i.e., the percentage of eyelid closure over the pupil. Perclose was previously specified as a relevant measure of drowsiness in several driving simulator studies (NHTSA Final Report HS-808 640; TRIS 00745689). In the present research, further validation of Perclose was established among other measures, in a controlled sleep deprivation study, using a well-known psychophysical index of lapses in visual attention, i.e., Psychomotor Vigilance Task (PVT). The present study provides the scientific and practical basis to relate real-time lapses in visual attention to over-the-road driving performance.

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References

1990Subjective and Objective Sleepiness in the Active Individual 1973Quantification of Sleepiness: A New Approach 1985Microcomputer analyses of performance on a portable, simple visual RT task during sustained operations 1995Sleep related vehicle accidents 1995An overview of sleepiness and accidents 1992Circadian and sleep/wake dependent aspects of subjective alertness and cognitive performance 1995Characteristics of crashes attributed to the driver having fallen asleep 1994Blink Rate: A Possible Measure of Fatigue

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