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A cross-national investigation of psychosis-like experiences in five European countries included in the E-CLECTIC study: Psychometric challenges in studying their measurement

S. Siddi, S. Ochoa, F. Larøi, TM. Lincoln, B. Schlier, Y. Zaytseva, J. Laloyaux, E. Kozáková, M. Cella, E. Ntouros, V. Bozikas, NB. Rocha, Ł. Gawęda, SA. Rocha, A. Preti, E-CLECTIC group

. 2024 ; 339 (-) : 116072. [pub] 20240705

Language English Country Ireland

Document type Journal Article

Persistent link   https://www.medvik.cz/link/bmc24019109

BACKGROUND: Psychotic-like experiences (PLEs) are subtle, subclinical perturbations of perceptions and thoughts and are common in the general population. Their characterisation and unidimensionality are still debated. METHODS: This study was conducted by the Electronic-halluCinations-Like Experiences Cross-culTural International Consortium (E-CLECTIC) and aimed at measuring the Community Assessment of Psychic Experiences (CAPE) factorial structure across five European countries (Belgium; Czech Republic, Germany; Greece, and Spain) and testing the adequacy of the unidimensional polytomous Rasch model of the tool via Partial Credit Model (PCM) of the CAPE to detect people with a high risk for developing psychosis. RESULTS: The sample included 1461 participants from the general population. The factorial analysis confirmed the best fit for the bifactor implementation of the three-factor model, including the positive, negative and depressive dimensions and a general factor. Moreover, the unidimensional polytomous Rasch analysis confirmed that CAPE responses reflected one underlying psychosis proneness. CONCLUSIONS: The study proved that the CAPE measures a single latent dimension of psychosis-proneness. The CAPE might help locate and estimate psychosis risk and can be used as a screening tool in primary care settings/education settings.

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$a BACKGROUND: Psychotic-like experiences (PLEs) are subtle, subclinical perturbations of perceptions and thoughts and are common in the general population. Their characterisation and unidimensionality are still debated. METHODS: This study was conducted by the Electronic-halluCinations-Like Experiences Cross-culTural International Consortium (E-CLECTIC) and aimed at measuring the Community Assessment of Psychic Experiences (CAPE) factorial structure across five European countries (Belgium; Czech Republic, Germany; Greece, and Spain) and testing the adequacy of the unidimensional polytomous Rasch model of the tool via Partial Credit Model (PCM) of the CAPE to detect people with a high risk for developing psychosis. RESULTS: The sample included 1461 participants from the general population. The factorial analysis confirmed the best fit for the bifactor implementation of the three-factor model, including the positive, negative and depressive dimensions and a general factor. Moreover, the unidimensional polytomous Rasch analysis confirmed that CAPE responses reflected one underlying psychosis proneness. CONCLUSIONS: The study proved that the CAPE measures a single latent dimension of psychosis-proneness. The CAPE might help locate and estimate psychosis risk and can be used as a screening tool in primary care settings/education settings.
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$a Larøi, Frank $u Department of Psychology, University of Oslo, Oslo, Norway; Psychology and Neuroscience of Cognition Research Unit, University of Liège, Liège, Belgium
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$a Lincoln, Tania M $u Clinical Psychology and Psychotherapy, Institute of Psychology, Faculty of Psychology and Human Movement Science, Universität Hamburg, Hamburg, Germany
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$a Schlier, Björn $u Clinical Psychology and Psychotherapy, Institute of Psychology, Faculty of Psychology and Human Movement Science, Universität Hamburg, Hamburg, Germany
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$a Cella, Matteo $u Department of Psychology, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom
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$a Ntouros, Evangelos $u Psychiatric Department, 424 General Military Hospital of Thessaloniki, Thessaloniki, Greece; 2nd Department of Psychiatry, Aristotle University of Thessaloniki, Psychiatric Hospital of Thessaloniki, Thessaloniki, Greece
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$a Bozikas, Vasileios $u 2nd Department of Psychiatry, Aristotle University of Thessaloniki, Psychiatric Hospital of Thessaloniki, Thessaloniki, Greece
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