Title: Assessing sub-clinical psychosis phenotypes in the general population : a multidimensional approach
Authors : Rössler, Wulf
Ajdacic-Gross, Vladeta
Müller, Mario
Rodgers, Stephanie
Haker, Helene
Hengartner, Michael Pascal
Published in : Schizophrenia Research
Volume(Issue) : 161
Issue : 2-3
Pages : 194
Pages to: 201
Publisher / Ed. Institution : Elsevier BV
Issue Date: Feb-2015
Language : Englisch / English
Subjects : Sub-clinical psychosis; Psychotic-like experiences; Proneness to psychosis; Schizotypy; Epidemiology; Community sample; Risk factors
Subject (DDC) : 616.89: Psychische Störungen, klinische Psychologie, Psychiatrie
Abstract: Several studies have demonstrated that expression of a psychosis phenotype can be observed below the threshold of its clinical detection. To date, however, no conceptual certainty has been reported for the validity and reliability of sub-clinical psychosis. Our main objectives were to assess the prevalence rates and severity of various psychosis symptoms in a representative community sample. Furthermore, we wanted to analyze which latent factors are depicted by several currently used psychosis questionnaires. We also examined how those latent factors for sub-clinical psychosis are linked to psychosocial factors, normal personality traits, and coping abilities related to chronic stress. Most of the eight subscales from the Paranoia Checklist and the Structured Interview for Assessing Perceptual Anomalies had a very similar type of distribution, i.e., an inverse Gaussian (Wald) distribution. This supported the notion of a continuity of psychotic symptoms, which we would expect to find for continuously distributed symptoms within the general population. Sub-clinical psychosis can be reduced to two different factors – one representing odd beliefs about the world and odd behavior, and the other one representing anomalous perceptions (such as hallucinations). Persons with odd beliefs and behavior are under greater burden and more susceptible to psychosocial risks than are persons with anomalous perceptions. These sub-clinical psychosis syndromes are also related to stable personality traits. In conclusion, we obtained strong support for the notion that there is no natural cut-off separating psychotic illness from good health. Sub-clinical psychosis of any kind is not trivial because it is associated with various types of social disability.
Departement: Angewandte Psychologie
Publication type: Beitrag in wissenschaftlicher Zeitschrift / Article in scientific Journal
Type of review: Peer review (Publikation)
DOI : 10.1016/j.schres.2014.11.033
ISSN: 0920-9964
URI: https://digitalcollection.zhaw.ch/handle/11475/2291
License (according to publishing contract) : Lizenz gemäss Verlagsvertrag / Licence according to publishing contract
Appears in Collections:Publikationen Angewandte Psychologie

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