title: [Sleepiness predicts an increase in dissociative symptoms: a field study].
abstract: BACKGROUND
  In laboratory studies, sleepiness has been found to increase dissociative symptoms.
  
  
  OBJECTIVE
  To explore the link between sleepiness and dissociation in a natural setting.
  
  
  METHODS
  A longitudinal study was performed among volunteers at a pop festival. Information was collected via self-report scales at four successive test moments spread over a 12-hour period.
  
  
  RESULTS
  Sleepiness was the only variable that could predict the increase in dissociative symptoms. This result was not mediated by a deteriorated mood.
  
  
  CONCLUSIONS
  Our data suggest that sleepiness intensifies dissociative symptoms, even if it occurs outside a laboratory environment. Studies focusing on sleep normalisation may provide insights into new ways of treating dissociative symptoms.
authors: Universiteit Maastricht. Dalena.vanderkloet@masstrichtuniversity.nl
authors: D
authors: D
authors: van der Kloet
authors: T
authors: T
authors: Giesbrecht
authors: H
authors: H
authors: Merckelbach
mesh_terms: D000328:Adult; D004213:Dissociative Disorders / Q000453:epidemiology* / Q000209:etiology* / Q000523:psychology; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D012890:Sleep / Q000502:physiology*; D012892:Sleep Deprivation / Q000150:complications*