A Elahi1, G Perez Algorta2, F Varese3, J C McIntyre4, R P Bentall5. 1. University of Liverpool, Institute of Psychology, Health and Society, Waterhouse Building, Block B, Brownlow St, Liverpool L69 3GL, United Kingdom. Electronic address: hlaelahi@liverpool.ac.uk. 2. Lancaster University, Spectrum Centre for Mental Health Research, Furness Building C73, Lancaster LA1 4YG, United Kingdom. Electronic address: g.perezalgorta@lancaster.ac.uk. 3. University of Manchester, Division of Psychology and Mental Health, School of Health Sciences, Zochonis Building, Manchester M13 9PL, United Kingdom. Electronic address: filippo.varese@manchester.ac.uk. 4. University of Liverpool, Institute of Psychology, Health and Society, Waterhouse Building, Block B, Brownlow St, Liverpool L69 3GL, United Kingdom. Electronic address: j.mcintyre@liverpool.ac.uk. 5. University of Liverpool, Institute of Psychology, Health and Society, Waterhouse Building, Block B, Brownlow St, Liverpool L69 3GL, United Kingdom. Electronic address: rpb@liverpool.ac.uk.
Abstract
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.
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 psychoticpatients 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.
Authors: Robert F Krueger; Roman Kotov; David Watson; Miriam K Forbes; Nicholas R Eaton; Camilo J Ruggero; Leonard J Simms; Thomas A Widiger; Thomas M Achenbach; Bo Bach; R Michael Bagby; Marina A Bornovalova; William T Carpenter; Michael Chmielewski; David C Cicero; Lee Anna Clark; Christopher Conway; Barbara DeClercq; Colin G DeYoung; Anna R Docherty; Laura E Drislane; Michael B First; Kelsie T Forbush; Michael Hallquist; John D Haltigan; Christopher J Hopwood; Masha Y Ivanova; Katherine G Jonas; Robert D Latzman; Kristian E Markon; Joshua D Miller; Leslie C Morey; Stephanie N Mullins-Sweatt; Johan Ormel; Praveetha Patalay; Christopher J Patrick; Aaron L Pincus; Darrel A Regier; Ulrich Reininghaus; Leslie A Rescorla; Douglas B Samuel; Martin Sellbom; Alexander J Shackman; Andrew Skodol; Tim Slade; Susan C South; Matthew Sunderland; Jennifer L Tackett; Noah C Venables; Irwin D Waldman; Monika A Waszczuk; Mark H Waugh; Aidan G C Wright; David H Zald; Johannes Zimmermann Journal: World Psychiatry Date: 2018-10 Impact factor: 49.548
Authors: Robert F Krueger; Roman Kotov; David Watson; Miriam K Forbes; Nicholas R Eaton; Camilo J Ruggero; Leonard J Simms; Thomas A Widiger; Thomas M Achenbach; Bo Bach; R Michael Bagby; Marina A Bornovalova; William T Carpenter; Michael Chmielewski; David C Cicero; Lee Anna Clark; Christopher Conway; Barbara DeClercq; Colin G DeYoung; Anna R Docherty; Laura E Drislane; Michael B First; Kelsie T Forbush; Michael Hallquist; John D Haltigan; Christopher J Hopwood; Masha Y Ivanova; Katherine G Jonas; Robert D Latzman; Kristian E Markon; Joshua D Miller; Leslie C Morey; Stephanie N Mullins-Sweatt; Johan Ormel; Praveetha Patalay; Christopher J Patrick; Aaron L Pincus; Darrel A Regier; Ulrich Reininghaus; Leslie A Rescorla; Douglas B Samuel; Martin Sellbom; Alexander J Shackman; Andrew Skodol; Tim Slade; Susan C South; Matthew Sunderland; Jennifer L Tackett; Noah C Venables; Irwin D Waldman; Monika A Waszczuk; Mark H Waugh; Aidan G C Wright; David H Zald; Johannes Zimmermann Journal: Ann Med Psychol (Paris) Date: 2021-01-08 Impact factor: 0.380
Authors: Jack J Blanchard; Alexandra Andrea; Ryan D Orth; Christina Savage; Melanie E Bennett Journal: Psychiatry Res Date: 2020-02-07 Impact factor: 3.222