title: The influence of a 1 h nap on performance overnight.
abstract: The effect on performance overnight of a 1 h nap taken at 0200 h was studied in six young female subjects. The subjects completed three schedules, including one with a nap and two without a nap, during which either a placebo or 300 mg caffeine was ingested at 2315 h. Performance was measured from 1700 h in the evening until 1030 h the next morning. Caffeine improved performance overnight on almost all tasks compared with placebo. The nap had some limited beneficial effect compared with placebo, but most tasks remained impaired.
authors.forename: A S
authors.initials: AS
authors.lastname: Rogers
authors.forename: M B
authors.initials: MB
authors.lastname: Spencer
authors.forename: B M
authors.initials: BM
authors.lastname: Stone
authors.forename: A N
authors.initials: AN
authors.lastname: Nicholson
mesh_terms: D000328:Adult; D002110:Caffeine / Q000494:pharmacology; D005260:Female; D006801:Humans; D011597:Psychomotor Performance / Q000187:drug effects / Q000502:physiology*; D012890:Sleep / Q000502:physiology*; D013647:Task Performance and Analysis; D014937:Work; D014940:Work Schedule Tolerance
chemical_list: D002110:Caffeine