Sustained vigilance I—Signal detection during a 24-hour continuous watch

The Psychological Record - 2017
Robert A. Baker1, J. Roger Ware1, Raymond R. Sipowicz1
1U. S. Army Armor Human Research Unit, Fort Knox, USA

Tóm tắt

Two groups of 10 Ss each monitored brief interruptions of a continuous light source for 24 consecutive hours. The vigilance decrement was found to be similar to that usually noted in shorter watch sessions—a general decrease in detection with time on watch. Seven of the 20 Ss remained awake for the entire watch session, one detecting 81.3 per cent of the signals presented. An analysis of individual detection curves revealed periodic and partial recovery effects of short duration. The results also suggest that the extent of time on watch determines the efficiency of detection—this efficiency being lowest after 16 to 18 hours of continuous watch. It was also noted that the Ss did not suffer as rapid a decrement as might have been expected on the basis of previous research.

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