Abstract
Abstract : Today's military operational environment demands sustained attention and vigilance. Mistakes in these environments can have devastating consequences. Currently, there is no tool to measure operator performance in these environments and the lapse is only noticed after a mistake is made. The purpose of this study is to determine the possible use of an eye-tracker to detect changes in vigilance performance. Blink frequency, blink duration, PERCLOS, pupil diameter, pupil eccentricity, pupil velocity, and signal detection all had a significant change over time (p less .05) during the vigilance task. All of these eye metrics except pupil diameter increased as vigilance performance declined. Pupil diameter is the only oculometric that was found to decrease with performance, which has been reported in previous studies during a monotonous task. The results indicate that these oculometrics could be used to detect changes in vigilance.
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