title: Effects of cumulative sleep restriction on self-perceptions while multitasking.
abstract: This study addressed a rarely studied question of self-perceptions of performance and overall functional state during cumulative sleep restriction and the ensuing recovery period. Twenty healthy male volunteers, aged 19-29 years, were divided into a sleep restriction group (n = 13) and a control group (n = 7). On the first 2 nights, the sleep restriction group had an 8-h sleep opportunity that was restricted to 4 h for the next 5 nights, and then restored to 8 h for the last 2 nights. The control group had an 8-h sleep opportunity each night. Each day participants accomplished 50-min multitask sessions and gave self-ratings in their connection. Similar to our previous findings on multitasking performance, self-perceived task performance, sleepiness and mental fatigue impaired during the sleep restriction and returned to baseline during the recovery phase. Self-perceived mental effort, tension, task difficulty and task pace showed no sensitivity to the sleep restriction. We concluded that sleep-restricted individuals can probably make use of some self-perceptions when assessing their 'fitness for duty'. However, at the individual level these measures seem to be inaccurate in revealing actual performance impairments.
authors.affiliation: Centre of Expertise for Human Factors at Work, Finnish Institute of Occupational Health, Helsinki, Finland. mikael.sallinen@ttl.fi
authors.forename: Mikael
authors.initials: M
authors.lastname: Sallinen
authors.forename: Jussi
authors.initials: J
authors.lastname: Onninen
authors.forename: Katriina
authors.initials: K
authors.lastname: Tirkkonen
authors.forename: Marja-Leena
authors.initials: ML
authors.lastname: Haavisto
authors.forename: Mikko
authors.initials: M
authors.lastname: Härmä
authors.forename: Tomohide
authors.initials: T
authors.lastname: Kubo
authors.forename: Pertti
authors.initials: P
authors.lastname: Mutanen
authors.forename: Jussi
authors.initials: J
authors.lastname: Virkkala
authors.forename: Asko
authors.initials: A
authors.lastname: Tolvanen
authors.forename: Tarja
authors.initials: T
authors.lastname: Porkka-Heiskanen
mesh_terms: D000328:Adult; D006970:Disorders of Excessive Somnolence / Q000209:etiology / Q000523:psychology; D005221:Fatigue / Q000209:etiology / Q000523:psychology; D006801:Humans; D008297:Male; D009483:Neuropsychological Tests; D017286:Polysomnography; D011597:Psychomotor Performance / Q000502:physiology*; D012649:Self Concept; D012890:Sleep / Q000502:physiology*; D012892:Sleep Deprivation / Q000150:complications / Q000503:physiopathology* / Q000523:psychology; D013647:Task Performance and Analysis; D055815:Young Adult