Schizophrenia Research
Volume 89, Issue 1 , Pages 119-122, January 2007

The Psychotic Symptom Rating Scales (PSYRATS): Their usefulness and properties in first episode psychosis

  • Richard Drake

      Affiliations

    • Division of Psychiatry, University of Manchester, 2nd Floor Education and Research Centre, Wythenshawe Hospital, Manchester, M23 9PL, United Kingdom
    • Corresponding Author InformationCorresponding author. Tel.: +44 161 291 5888; fax: +44 161 292 5882.
    • ,
  • Gillian Haddock

      Affiliations

    • School of Psychological Sciences, University of Manchester, Rutherford House, Manchester Science Park, Lloyd Street North, Manchester, M15 6SZ, United Kingdom
    • ,
  • Nicholas Tarrier

      Affiliations

    • School of Psychological Sciences, University of Manchester, Oxford Road, Manchester, M15 9PL, United Kingdom
    • ,
  • Richard Bentall

      Affiliations

    • School of Psychological Sciences, University of Manchester, Oxford Road, Manchester, M15 9PL, United Kingdom
    • ,
  • Shôn Lewis

      Affiliations

    • Division of Psychiatry, University of Manchester, 2nd Floor Education and Research Centre, Wythenshawe Hospital, Manchester, M23 9PL, United Kingdom

Received 8 April 2006; received in revised form 14 April 2006; accepted 25 April 2006. published online 10 November 2006.

Abstract 

The aim of this study was to investigate the reliability, validity and structure of the Psychotic Symptom Rating Scales (PSYRATS) in 257 subjects presenting with acute first episodes of schizophrenia or related disorders. The PSYRATS have been shown to assess dimensions of hallucination and delusions reliably and validly in chronically psychotic patients but not in first episode patients. Item reliability was investigated and subscale performance compared to the PANSS. The PSYRATS had good inter-rater and retest reliability. Validity was good, as assessed by internal consistency, sensitivity to change, and in relation to the PANSS. There was evidence of two delusion factors and three for hallucinations. The scales are useful complements to existing measures of symptom severity.

Keywords: First episode, Schizophrenia, Delusions, PSYRATS

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PII: S0920-9964(06)00213-1

doi:10.1016/j.schres.2006.04.024

Schizophrenia Research
Volume 89, Issue 1 , Pages 119-122, January 2007

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