Skip to main content Accessibility help

We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.

Close cookie message
×
  1. Home
  2. Search

Refine search

Refine search

Access:
Content type:
Publication date:
Apply   From and To filters
Subject: Show more
Journals Show more
Publishers: Show more
Societies Show more
Series: Show more
Collections: Show more

Actions for selected content:

Select all | Deselect all
  • View selected items
  • Export citations
  • Download PDF (zip)
  • Save to Kindle
  • Save to Dropbox
  • Save to Google Drive

Save Search

You can save your searches here and later view and run them again in "My saved searches".

Please provide a title, maximum of 40 characters.
Cancel
×

1 results

  • Signs and Symptoms of Psychotic Illness (SSPI): A rating scale

  • Peter F. Liddle, Elton T. C. Ngan, Gary Duffield, King Kho, Anthony J. Warren
  • Journal:
    The British Journal of Psychiatry / Volume 180 / Issue 1 / January 2002
    Published online by Cambridge University Press:
    02 January 2018, pp. 45-50
    Print publication:
    January 2002
    • Article
      • You have access
    • PDF
    • HTML
    • Export citation
  • Background

    In the rating scales commonly used for assessing response to antipsychotic treatment, individual items embrace symptoms that apparently arise from distinguishable pathophysiological processes and might be expected to respond differently to treatment.

    Aims

    To test the reliability sensitivity to change and factor structure of a new scale for the assessment of the Signs and Symptoms of Psychotic Illness (the SSPI).

    Method

    Interrater reliability was evaluated by determining the intraclass correlation for the ratings of 63 patients. Sensitivity to change was assessed in a longitudinal study of 33 patients. Factor structure was determined from scores for 155 patients.

    Results

    The intraclass correlation was satisfactory for all individual items and excellent for the total score. Scores were sensitive to change. A change in Clinical Global Impression of one unit corresponded to an SSPI total score change of 31%. Factor analysis revealed five clusters of symptoms.

    Conclusions

    The SSPI provides a sensitive and reliable measure of the five major clusters of symptoms that occur commonly in psychotic illness.