title: Is this my voice or yours? The role of emotion and acoustic quality in self-other voice discrimination in schizophrenia.
abstract: Impairments in self-other voice discrimination have been consistently reported in schizophrenia, and associated with the severity of auditory verbal hallucinations (AVHs). This study probed the interactions between voice identity, voice acoustic quality, and semantic valence in a self-other voice discrimination task in schizophrenia patients compared with healthy subjects. The relationship between voice identity discrimination and AVH severity was also explored.
  
  
  
  Seventeen chronic schizophrenia patients and 19 healthy controls were asked to read aloud a list of adjectives characterised by emotional or neutral content. Participants' voice was recorded in the first session. In the behavioural task, 840 spoken words differing in identity (self/non-self), acoustic quality (undistorted/distorted), and semantic valence (negative/positive/neutral) were presented. Participants indicated if the words were spoken in their own voice, another person's voice, or were unsure.
  
  
  
  Patients were less accurate than controls in the recognition of self-generated speech with negative content only. Impaired recognition of negative self-generated speech was associated with AVH severity ("voices conversing").
  
  
  
  These results suggest that abnormalities in higher order processes (evaluation of the salience of a speech stimulus) modulate impaired self-other voice discrimination in schizophrenia. Abnormal processing of negative self-generated speech may play a role in the experience of AVH.
authors.affiliation: a Laboratory of Neuroscience, Department of Psychiatry , Harvard Medical School, & Veterans Affairs Boston Healthcare System, Brockton V.A. Medical Center Psychiatry , Brockton , MA , USA.|b Neuropsychophysiology Laboratory, CIPsi , School of Psychology, University of Minho , Braga , Portugal.|c Faculty of Psychology , University of Lisbon , Lisbon , Portugal.
authors.forename: Ana P
authors.initials: AP
authors.lastname: Pinheiro
authors.affiliation: a Laboratory of Neuroscience, Department of Psychiatry , Harvard Medical School, & Veterans Affairs Boston Healthcare System, Brockton V.A. Medical Center Psychiatry , Brockton , MA , USA.
authors.forename: Neguine
authors.initials: N
authors.lastname: Rezaii
authors.affiliation: d Computational Linguistics Department , University of Tübingen , Tübingen , Germany.
authors.forename: Andréia
authors.initials: A
authors.lastname: Rauber
authors.affiliation: a Laboratory of Neuroscience, Department of Psychiatry , Harvard Medical School, & Veterans Affairs Boston Healthcare System, Brockton V.A. Medical Center Psychiatry , Brockton , MA , USA.
authors.forename: Margaret
authors.initials: M
authors.lastname: Niznikiewicz
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D016022:Case-Control Studies; D004644:Emotions; D005260:Female; D006212:Hallucinations / Q000523:psychology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D021641:Recognition, Psychology; D012559:Schizophrenia / Q000150:complications*; D012565:Schizophrenic Psychology; D012660:Semantics; D013067:Speech Perception / Q000502:physiology*; D014831:Voice
keywords: Schizophrenia; auditory hallucinations; emotion; self; voice