Symptom dimensions of the psychotic symptom rating scales in psychosis: A multisite study

T.S. Woodward, K. Jung, H. Hwang, J. Yin, L.E. Taylor, M.S. Menon, E.R. Peters, E. Kuipers, Flavie Waters, T. Lecomte, I.E.C. Sommer, K. Daalman, R. Van Lutterveld, D. Hubl, J. Kindler, P. Homan, Johanna Badcock, S. Chhabra, M. Cella, S.K. Keedy & 5 others P. Allen, A. Mechelli, A. Preti, S. Siddi, D.H. Erickson

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Abstract

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. © 2014 The Author.
Original languageEnglish
Pages (from-to)S265-S274
JournalSchizophrenia Bulletin
Volume40
Issue numberSUPPL. 4
DOIs
Publication statusPublished - 2014

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Delusions
Hallucinations
Psychotic Disorders
Research
Cluster Analysis
Schizophrenia
Psychology

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Woodward, T. S., Jung, K., Hwang, H., Yin, J., Taylor, L. E., Menon, M. S., ... Erickson, D. H. (2014). Symptom dimensions of the psychotic symptom rating scales in psychosis: A multisite study. Schizophrenia Bulletin, 40(SUPPL. 4), S265-S274. https://doi.org/10.1093/schbul/sbu014
Woodward, T.S. ; Jung, K. ; Hwang, H. ; Yin, J. ; Taylor, L.E. ; Menon, M.S. ; Peters, E.R. ; Kuipers, E. ; Waters, Flavie ; Lecomte, T. ; Sommer, I.E.C. ; Daalman, K. ; Van Lutterveld, R. ; Hubl, D. ; Kindler, J. ; Homan, P. ; Badcock, Johanna ; Chhabra, S. ; Cella, M. ; Keedy, S.K. ; Allen, P. ; Mechelli, A. ; Preti, A. ; Siddi, S. ; Erickson, D.H. / Symptom dimensions of the psychotic symptom rating scales in psychosis: A multisite study. In: Schizophrenia Bulletin. 2014 ; Vol. 40, No. SUPPL. 4. pp. S265-S274.
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Woodward, TS, Jung, K, Hwang, H, Yin, J, Taylor, LE, Menon, MS, Peters, ER, Kuipers, E, Waters, F, Lecomte, T, Sommer, IEC, Daalman, K, Van Lutterveld, R, Hubl, D, Kindler, J, Homan, P, Badcock, J, Chhabra, S, Cella, M, Keedy, SK, Allen, P, Mechelli, A, Preti, A, Siddi, S & Erickson, DH 2014, 'Symptom dimensions of the psychotic symptom rating scales in psychosis: A multisite study' Schizophrenia Bulletin, vol. 40, no. SUPPL. 4, pp. S265-S274. https://doi.org/10.1093/schbul/sbu014

Symptom dimensions of the psychotic symptom rating scales in psychosis: A multisite study. / Woodward, T.S.; Jung, K.; Hwang, H.; Yin, J.; Taylor, L.E.; Menon, M.S.; Peters, E.R.; Kuipers, E.; Waters, Flavie; Lecomte, T.; Sommer, I.E.C.; Daalman, K.; Van Lutterveld, R.; Hubl, D.; Kindler, J.; Homan, P.; Badcock, Johanna; Chhabra, S.; Cella, M.; Keedy, S.K.; Allen, P.; Mechelli, A.; Preti, A.; Siddi, S.; Erickson, D.H.

In: Schizophrenia Bulletin, Vol. 40, No. SUPPL. 4, 2014, p. S265-S274.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Symptom dimensions of the psychotic symptom rating scales in psychosis: A multisite study

AU - Woodward, T.S.

AU - Jung, K.

AU - Hwang, H.

AU - Yin, J.

AU - Taylor, L.E.

AU - Menon, M.S.

AU - Peters, E.R.

AU - Kuipers, E.

AU - Waters, Flavie

AU - Lecomte, T.

AU - Sommer, I.E.C.

AU - Daalman, K.

AU - Van Lutterveld, R.

AU - Hubl, D.

AU - Kindler, J.

AU - Homan, P.

AU - Badcock, Johanna

AU - Chhabra, S.

AU - Cella, M.

AU - Keedy, S.K.

AU - Allen, P.

AU - Mechelli, A.

AU - Preti, A.

AU - Siddi, S.

AU - Erickson, D.H.

PY - 2014

Y1 - 2014

N2 - 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. © 2014 The Author.

AB - 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. © 2014 The Author.

U2 - 10.1093/schbul/sbu014

DO - 10.1093/schbul/sbu014

M3 - Article

VL - 40

SP - S265-S274

JO - Schizophrenia Bulletin

JF - Schizophrenia Bulletin

SN - 0586-7614

IS - SUPPL. 4

ER -