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CISDOC database

Document ID (ISN)111985
CIS number 11-0727
ISSN - Serial title 0001-4575 - Accident Analysis and Prevention
Year 2011
Convention or series no.
Author(s) Williamson A., Friswell R.
Title Investigating the relative effects of sleep deprivation and time of day on fatigue and performance
Bibliographic information May 2011, Vol.43, No.3, p.690-697. Illus. 22 ref.
Abstract The objective of this study was to examine the relative effects of time of day and sleep deprivation on fatigue and performance. Two independent groups were exposed to 28 h of sleep deprivation beginning at 06:00 h for one group (39 participants) and at 00:00 h for the other (22 participants). By varying the start time for the two groups, but keeping constant the duration of sleep deprivation, the effects of variations in the time of day of testing were examined. For the 06:00 h start group, the longest period without sleep occurred close to the low point of the circadian rhythm. For the 00:00 h start group, the circadian low point coincided with only two to six hours of sleep deprivation. Performance was evaluated two-hourly using computer-based cognitive performance and memory tests, together with subjective fatigue ratings. Both time of day and sleep deprivation affected performance. The implications of these findings for fatigue management are discussed.
Descriptors (primary) work efficiency; hours of work; sleep deprivation; fatigue assessment
Descriptors (secondary) Australia; circadian rhythm; cognitive performance; subjective assessment
Document type D - Periodical articles
Subject(s) Occupational physiology
Broad subject area(s) Physiology, ergonomics
Browse category(ies) Fatigue
Hours of work
Vigilance