| Volume 3, Issue 4, 582-593, 2012 |
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|Assessing Levels of Subthreshold Psychotic Symptoms in the Recovery Phase: the Schizotypal Symptoms Inventory (SSI)|
|Jo Hodgekins (a), Sian Coker (a), Daniel Freeman (b), Katarzyna Ray-Glover(c), Paul Bebbington (d), Philippa Garety (e), Elizabeth Kuipers (e), Graham Dunn (f), David Fowler (a)|
|(a) Department of Psychological Sciences, Norwich Medical School, University of East Anglia, Norwich, UK.|
(b) Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, OX3 7JX
(c) Department of Biostatistics and Computing, Institute of Psychiatry, King's College London, Denmark Hill, London, UK.
(d) Department of Mental Health Sciences, Royal Free and University College Medical School, University College London, UK.
(e) Department of Psychology, Institute of Psychiatry, King's College London, Denmark Hill, London, UK.
(f) School of Community Based Medicine, University of Manchester, Manchester, UK.
|Volume 3, Issue 4, 2012, Pages 582-593|
|Objective: Subthreshold psychotic symptoms occurring during the recovery stages of psychosis may impede social functioning and precipitate relapse. Traditional assessment tools lack adequate sensitivity to assess such phenomena. The study aim was to develop a comprehensive self-report measure of residual psychotic symptoms.|
Method: The psychometric properties of the Schizotypal Symptoms Inventory (SSI) were analysed in a sample of 808 students and a sample of 126 clinical cases recovering from psychosis. Levels of schizotypal symptoms were compared between the two groups.
Results: The SSI was shown to have good psychometric properties. The clinical sample had higher scores on all dimensions of the SSI than the non-clinical sample. Social anxiety symptoms were particularly prevalent in the recovery phase.
Conclusions: Individuals recovering from acute psychosis experience high levels of subthreshold psychotic symptoms which may impede long-term recovery. The SSI has robust psychometric properties and could be used to assess these phenomena.
|Table of Contents|
Aims of the Study
Participants and Procedure
Psychometric analysis of the SSI
Reliability and validity
Comparison of factor scores in the non-clinical and clinical samples
Creation of a Brief Version of the SSI
Descriptive statistics of the Brief SSI
Psychometric analysis of the Brief SSI
Prevalence of Schizotypal Symptoms in Clinical and Non-Clinical Samples
Distributions of Trait and State Symptom Counts
|Jo Hodgekins, Norwich Medical School, Health Policy and Practice, University of East Anglia, Norwich, NR4 7TJ. |
|Psychosis, Schizotypal Symptoms, Recovery |
|Received 22 Jun 2011; Revised 8 Feb 2012; Accepted 8 Feb 2012; In Press 23 Sep 2012 |