title: Jumping to conclusions and the persistence of delusional beliefs in first episode psychosis.
abstract: BACKGROUND
  Cognitive biases may contribute to delusion persistence. We tested this in a longitudinal study of first episode psychosis (FEP).
  
  
  METHODS
  34 FEP patients completed assessments of delusions and Jumping to Conclusions (JTC) at baseline and 12-month follow-up.
  
  
  RESULTS
  JTC was associated with baseline delusion severity (t(32)=2.7, p=0.01). Baseline delusions persisted at follow-up for 8/20 participants (40%), who all jumped to conclusions (8/8, 100%), compared to half of those with no or changeable delusions (14/26, 54%; χ(2) (df=1)=5.7, p=0.03; Phi=0.4).
  
  
  CONCLUSIONS
  Findings implicate cognitive biases in delusion persistence, and support the potential to reduce delusions through reasoning-focused interventions.
authors.affiliation: King's College, London, Department of Psychology, Institute of Psychiatry, Psychology & Neuroscience, London, UK; King's College, London, Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, London, UK. Electronic address: aurora.falcone@kcl.ac.uk.
authors.forename: M Aurora
authors.initials: MA
authors.lastname: Falcone
authors.affiliation: King's College, London, Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, London, UK.
authors.forename: Robin M
authors.initials: RM
authors.lastname: Murray
authors.affiliation: King's College, London, Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, London, UK.
authors.forename: Jennifer A
authors.initials: JA
authors.lastname: O'Connor
authors.affiliation: King's College, London, Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, London, UK.
authors.forename: Leanne N
authors.initials: LN
authors.lastname: Hockey
authors.affiliation: King's College, London, Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, London, UK.
authors.forename: Poonam
authors.initials: P
authors.lastname: Gardner-Sood
authors.affiliation: King's College, London, Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, London, UK.
authors.forename: Marta
authors.initials: M
authors.lastname: Di Forti
authors.affiliation: University of Oxford, Department of Psychiatry, Warneford Hospital, Oxford, UK.
authors.forename: Daniel
authors.initials: D
authors.lastname: Freeman
authors.affiliation: King's College, London, Department of Psychology, Institute of Psychiatry, Psychology & Neuroscience, London, UK.
authors.forename: Suzanne
authors.initials: S
authors.lastname: Jolley
mesh_terms: D000293:Adolescent; D000328:Adult; D001364:Awareness; D003657:Decision Making / Q000502:physiology*; D003702:Delusions / Q000209:etiology* / Q000523:psychology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011569:Psychiatric Status Rating Scales; D011618:Psychotic Disorders / Q000150:complications*; D012720:Severity of Illness Index; D055815:Young Adult
keywords: Delusions; Jumping to conclusions; Neuropsychology; Psychosis; Reasoning