title: The three-process model of alertness and its extension to performance, sleep latency, and sleep length.
abstract: This paper summarizes a mathematical/computer model for predicting alterness/performance in daily living. The model uses sleep data as input and contains a circadian and a homeostatic component (amount of prior wake and amount of prior sleep), which are summed to yield predicted alertness (on a scale between 1 and 16) as well as performance on monotonous tasks. The model includes an identification of levels at which the risk of performance/ alertness impairment starts, as well as prediction of sleep latency and time of awakening of sleep episodes. It is suggested that the model may be used to evaluate work/rest schedules in terms of sleep-related safety risks.
authors.affiliation: IPM, Karolinska Institute, Stockholm, Sweden.
authors.forename: T
authors.initials: T
authors.lastname: Akerstedt
authors.forename: S
authors.initials: S
authors.lastname: Folkard
mesh_terms: D002940:Circadian Rhythm; D003198:Computer Simulation; D006706:Homeostasis; D006801:Humans; D008954:Models, Biological; D008960:Models, Psychological; D008962:Models, Theoretical; D012146:Rest; D012890:Sleep / Q000502:physiology*; D014851:Wakefulness / Q000502:physiology*; D014940:Work Schedule Tolerance