Symptom dimensions of the psychotic symptom rating scales in psychosis: a multisite study.
- Woodward TS Department of Psychiatry, University of British Columbia, Vancouver, British Columbia, Canada; BC Mental Health and Addictions Research Institute, Vancouver, British Columbia, Canada; todd.woodward@ubc.ca.
- Jung K Department of Pediatrics, University of Texas Health Science Center, Houston, TX;
- Hwang H Department of Psychology, McGill University, Montreal, Québec, Canada;
- Yin J Department of Psychiatry, University of British Columbia, Vancouver, British Columbia, Canada; BC Mental Health and Addictions Research Institute, Vancouver, British Columbia, Canada;
- Taylor L Department of Psychiatry, University of British Columbia, Vancouver, British Columbia, Canada; BC Mental Health and Addictions Research Institute, Vancouver, British Columbia, Canada;
- Menon M Department of Psychiatry, University of British Columbia, Vancouver, British Columbia, Canada;
- Peters E Department of Psychology, and the BRC of the South London and Maudsley NHS Foundation Trust, Institute of Psychiatry, King's College London, London, UK;
- Kuipers E Department of Psychology, and the BRC of the South London and Maudsley NHS Foundation Trust, Institute of Psychiatry, King's College London, London, UK;
- Waters F North Metro Health Service Mental Health, and School of Psychiatry and Clinical Neuroscience, University of Western Australia, Perth, Australia;
- Lecomte T Department of Psychology, University of Montreal, Montreal, Québec, Canada;
- Sommer IE Department of Psychiatry, Universitair Medisch Centrum, Utrecht, The Netherlands;
- Daalman K Department of Psychiatry, Universitair Medisch Centrum, Utrecht, The Netherlands;
- van Lutterveld R Department of Psychiatry, Universitair Medisch Centrum, Utrecht, The Netherlands;
- Hubl D Department of Psychiatric Neurophysiology, University Hospital of Psychiatry, University of Bern, Bern, Switzerland;
- Kindler J Department of Psychiatric Neurophysiology, University Hospital of Psychiatry, University of Bern, Bern, Switzerland;
- Homan P Department of Psychiatric Neurophysiology, University Hospital of Psychiatry, University of Bern, Bern, Switzerland;
- Badcock JC School of Psychology, University of Western Australia, Crawley, Western Australia, Australia;
- Chhabra S School of Psychology, University of Western Australia, Crawley, Western Australia, Australia;
- Cella M Department of Psychology, and the BRC of the South London and Maudsley NHS Foundation Trust, Institute of Psychiatry, King's College London, London, UK;
- Keedy S Department of Psychiatry and Behavioral Neuroscience, University of Chicago, Chicago, IL;
- Allen P Department of Psychosis Studies, King's College London, London, UK;
- Mechelli A Department of Psychosis Studies, King's College London, London, UK;
- Preti A Department of Education, Psychology, Philosophy, University of Cagliari, Cagliari, Italy;
- Siddi S Department of Education, Psychology, Philosophy, University of Cagliari, Cagliari, Italy;
- Erickson D Fraser North Early Psychosis Program, Royal Columbian Hospital, New Westminster, British Columbia, Canada.
- 2014-06-18
Published in:
- Schizophrenia bulletin. - 2014
delusions
hallucinations
principal component analysis
psychosis
schizophrenia
structural equation modeling
symptom rating scales
Adult
Delusions
Factor Analysis, Statistical
Female
Hallucinations
Humans
Male
Models, Psychological
Psychiatric Status Rating Scales
Psychometrics
Psychotic Disorders
Schizophrenia
Schizophrenic Psychology
Young Adult
English
The Psychotic Symptom Rating Scales (PSYRATS) is an instrument designed to quantify the severity of delusions and hallucinations and is typically used in research studies and clinical settings focusing on people with psychosis and schizophrenia. It is comprised of the auditory hallucinations (AHS) and delusions subscales (DS), but these subscales do not necessarily reflect the psychological constructs causing intercorrelation between clusters of scale items. Identification of these constructs is important in some clinical and research contexts because item clustering may be caused by underlying etiological processes of interest. Previous attempts to identify these constructs have produced conflicting results. In this study, we compiled PSYRATS data from 12 sites in 7 countries, comprising 711 participants for AHS and 520 for DS. We compared previously proposed and novel models of underlying constructs using structural equation modeling. For the AHS, a novel 4-dimensional model provided the best fit, with latent variables labeled Distress (negative content, distress, and control), Frequency (frequency, duration, and disruption), Attribution (location and origin of voices), and Loudness (loudness item only). For the DS, a 2-dimensional solution was confirmed, with latent variables labeled Distress (amount/intensity) and Frequency (preoccupation, conviction, and disruption). The within-AHS and within-DS dimension intercorrelations were higher than those between subscales, with the exception of the AHS and DS Distress dimensions, which produced a correlation that approached the range of the within-scale correlations. Recommendations are provided for integrating these underlying constructs into research and clinical applications of the PSYRATS.
- Language
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- English
- Open access status
- hybrid
- Identifiers
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- DOI 10.1093/schbul/sbu014
- PMID 24936086
- Persistent URL
- https://folia.unifr.ch/global/documents/56432
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