title: Affective modulation of external misattribution bias in source monitoring in schizophrenia.
abstract: BACKGROUND
  Schizophrenic patients tend to attribute internal events to external agents, a bias that may be linked to positive symptoms. We investigated the effect of emotional valence on the cognitive bias.
  
  
  METHODS
  Male schizophrenic subjects (n=30) and an experimenter alternatively produced neutral and negative words. The subject then decided whether he or the experimenter had generated the item.
  
  
  RESULTS
  External misattributions were more common than self-misattributions, and the bias was greater for patients with active hallucinations and delusions relative to patients in remission. Actively psychotic patients but not patients in remission were more likely to generate external misattributions with negative relative to neutral words.
  
  
  CONCLUSIONS
  Affective modulation of the externalizing cognitive bias in source monitoring is evident in patients with hallucinations and delusions.
authors: Institute of Psychiatry, King's College London, London, UK.
authors: S G
authors: SG
authors: Costafreda
authors: G
authors: G
authors: Brébion
authors: P
authors: P
authors: Allen
authors: P K
authors: PK
authors: McGuire
authors: C H Y
authors: CH
authors: Fu
mesh_terms: D000328:Adult; D000339:Affect; D001288:Attention; D001364:Awareness; D003702:Delusions / Q000175:diagnosis / Q000523:psychology; D005260:Female; D006212:Hallucinations / Q000175:diagnosis / Q000523:psychology; D006801:Humans; D007389:Internal-External Control; D008297:Male; D018187:Personal Construct Theory; D011569:Psychiatric Status Rating Scales; D011936:Reality Testing; D012559:Schizophrenia / Q000175:diagnosis*; D012565:Schizophrenic Psychology; D012660:Semantics; D013060:Speech