title: The impact of sustained wakefulness and time-of-day on OSPAT performance.
abstract: Fatigue associated with shiftwork is a key contributor to human error in the workplace. One way to prevent fatigue-related errors from occurring is to identify fatigue in employees using fitness-for-duty measures. The Occupational Safety Performance Assessment Test (OSPAT), an unpredictable tracking task that measures hand-eye coordination, is currently being used as a fitness-for-duty measure in a variety of industries, but has not yet been validated as a test sensitive to the effects of fatigue. Consequently, the aim of this study was to systematically examine the impact of sustained wakefulness and time-of-day on OSPAT performance. Twenty individuals (10 male, 10 female), aged between 18-25 yr (M=20.90, SD=2.29) participated in the study, which was conducted in Australia. The study had a repeated measures design, whereby participants completed the OSPAT and measures of sustained attention (i.e., the psychomotor vigilance task: PVT), and subjective alertness (i.e., the Visual Analog Scale: VAS) every 2 h during 24 h of sustained wakefulness, beginning at 07:00 h. Results revealed that VAS ratings of alertness, PVT performance, and OSPAT performance declined significantly as hours of wakefulness increased during the night-time (all p<.01). Furthermore, a positive correlation between OSPAT and PVT performance was observed (r=0.40, p<.01). Overall, these findings suggest that OSPAT is sensitive to sustained wakefulness during the night-time, and builds the case for OSPAT being a suitable measure for determining fitness-for-duty in workplace environments.
authors.affiliation: The Centre for Sleep Research, 5th Floor Basil Hetzel Institute, The Queen Elizabeth Hospital, Woodville Rd, Woodville SA 5011, Australia.
authors.forename: Renée M
authors.initials: RM
authors.lastname: Petrilli
authors.forename: Sarah M
authors.initials: SM
authors.lastname: Jay
authors.forename: Drew
authors.initials: D
authors.lastname: Dawson
authors.forename: Nicole
authors.initials: N
authors.lastname: Lamond
mesh_terms: D000293:Adolescent; D000328:Adult; D001288:Attention / Q000502:physiology; D001315:Australia; D005221:Fatigue / Q000175:diagnosis / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D016272:Occupational Health; D011597:Psychomotor Performance / Q000502:physiology*; D013995:Time; D014851:Wakefulness / Q000502:physiology*; D014938:Work Capacity Evaluation