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Do paranoid delusions exist on a continuum with subclinical paranoia? A multi-method taxometric study

Elahi, A, Perez Algorta, G, Varese, F, McIntyre, JC and Bentall, RP (2017) Do paranoid delusions exist on a continuum with subclinical paranoia? A multi-method taxometric study. Schizophrenia Research, 190. pp. 77-81. ISSN 0920-9964

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Abstract

© 2017 Elsevier B.V. Background There is widespread interest in whether psychosis exists on a continuum with healthy functioning. Previous research has implied that paranoia, a common symptom of psychosis, exists on a continuum but this has not been investigated using samples including both patients and non-patients and up-to-date taxometric methods. Aim To assess the latent structure of paranoia in a diverse sample using taxometric methods. Method We obtained data from 2836 participants, including the general population as well as at-risk mental state and psychotic patients using the P-scale of the Paranoia and Deservedness Scale. Data were analysed using three taxometric procedures, MAMBAC, MAXEIG and L-MODE (Ruscio, 2016), and two sets of paranoia indicators (subscales and selected items from the P scale), including and excluding the patient groups. Results Eleven of the twelve analyses supported a dimensional model. Using the full sample and subscales as indicators, the MAMBAC analysis was ambiguous. Overall, the findings converged on a dimensional latent structure. Conclusions A dimensional latent structure of paranoia implies that the processes involved in sub-clinical paranoia may be similar to those in clinical paranoia.

Item Type: Article
Uncontrolled Keywords: 11 Medical And Health Sciences, 17 Psychology And Cognitive Sciences
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Divisions: Natural Sciences and Psychology
Publisher: Elsevier
Date Deposited: 26 Jul 2018 13:16
Last Modified: 14 Oct 2018 10:26
DOI or Identification number: 10.1016/j.schres.2017.03.022
URI: http://researchonline.ljmu.ac.uk/id/eprint/9028

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