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J Clin Psychol. 2018 Dec;74(12):2117-2133. doi: 10.1002/jclp.22658. Epub 2018 Jun 22.

Subtyping attenuated psychotic symptoms: A cluster analytic approach.

Author information

1
Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway.
2
NORMENT - Norwegian Center for Mental Disorders Research, University of Bergen, Bergen, Norway.
3
Psychology and Neuroscience of Cognition Research Unit, University of Liège, Liège, Belgium.
4
International Gaming Research Unit, Nottingham Trent University, Nottingham, United Kingdom.
5
Psychological Sciences Research Institute, Laboratory for Experimental Psychopathology, Université catholique de Louvain, Louvain-la-Neuve, Belgum.
6
Institute for Health and Behavior, University of Luxembourg, Esch-sur-Alzette, Luxembourg.

Abstract

OBJECTIVE:

The aim of the present study is to examine the heterogeneity of attenuated psychotic symptoms (PS) and related personality factors using a cluster analytic approach.

METHOD:

A large sample of participants from the general population was evaluated in terms of attenuated symptomatology (psychotic and affective) and two personality factors: encoding style and impulsivity traits.

RESULTS:

Cluster analysis emphasized the existence of five independent clusters: High Psychosis, High Positive, High Negative, High Impulsive-Low Psychosis, and Low Psychosis. Cluster comparisons demonstrated that the personality factors and PS are differentially involved in the clusters.

CONCLUSIONS:

The present study demonstrated that reliable and relatively distinct clusters of individuals from the general population can be identified based on established PS and related personality factors. The fact that a variety of profiles was observed contributes to a better understanding of the nature of the heterogeneity characterizing PS and has clear theoretical and clinical implications.

KEYWORDS:

delusion; encoding style; hallucination; impulsivity; schizophrenia; schizotypy

PMID:
29931670
DOI:
10.1002/jclp.22658
[Indexed for MEDLINE]

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