The non-entrained life of a young gentleman at Oxford.
Sleep logs over 9 months document the delayed sleep phase of a healthy male student at Oxford. The lack of any imperative zeitgebers also permits the rest-activity cycle to exhibit very long (circabidian) days similar to those seen under conditions of temporal isolation. No psychopathology or subjective distress was associated with this unusual rest-activity cycle: It was a preferred life-style.
D000293:Adolescent; D000328:Adult; D002940:Circadian Rhythm; D006801:Humans; D007439:Introversion, Psychological; D008297:Male; D012890:Sleep / Q000502:physiology*; D013334:Students / Q000523:psychology