title: Quantification of sleepiness: a new approach.
mesh_terms: D000293:Adolescent; D000328:Adult; D006801:Humans; D008297:Male; D008568:Memory; D011581:Psychological Tests; D011594:Psychometrics; D012649:Self Concept; D012890:Sleep; D012892:Sleep Deprivation; D014851:Wakefulness