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Updated: Feb 8, 2026

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Published on: March 19, 2012
Subtyping attenuated psychotic symptoms: A cluster analytic approach
Julien Laloyaux1,2,3, Frank Larøi1,2,3, Filip Nuyens4,5
1Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway.
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.
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