Translation and Validation of the French Version of the Revised Green et al., Paranoid Thoughts Scale (R-GPTS) in Two Samples: Non-Clinical and Clinical Adults.
Paranoia; psychometric properties; translation; Psychology (all); General Psychology
Abstract :
[en] Paranoia consists of unfounded beliefs that harm will be caused with intent to hurt the subject. Paranoid thoughts exist on a continuum of severity from severe forms in several psychological pathologies to milder forms in a significant minority of individuals of the general population (Freeman, 2007). It can be measured using several types of questionnaires. One recent questionnaire that measures paranoia in both clinical and non-clinical populations is the revised Green et al., Paranoid Thoughts Scale (R-GPTS) (Freeman et al., 2019). This questionnaire is an improved version of the Green et al., Paranoid Thoughts Scale (GPTS) (Green et al., 2008) and has excellent psychometric properties. In the present study, the R-GPTS was translated into French and the psychometric properties of the new French version were evaluated in a sample of the general population (N = 600) and in a clinical sample (N = 22). Confirmatory factor analysis supported the original two-factor structure (social reference and persecution subscales) of the R-GPTS. Evidence of excellent internal consistency of the R-GPTS was found. Furthermore, good convergent and discriminant validity was also found. Test-retest reliability showed significant positive correlations over a 1-month period. The findings discussed above were found in the non-clinical sample. Lastly, the R-GPTS revealed good preliminary criterion validity established from the comparison between the clinical and the non-clinical groups. In conclusion, the French version of the R-GPTS is a valid and reliable tool to measure paranoia in the general population. Due to the small sample size of the clinical sample, further studies are needed in order to confirm good psychometric properties in clinical populations, even though our preliminary findings are promising.
Disciplines :
Neurosciences & behavior
Author, co-author :
Latteur, Alizée ; Université de Liège - ULiège > Psychologie et Neuroscience Cognitives (PsyNCog)
Laroi, Frank ; Université de Liège - ULiège > Département de Psychologie ; Department of Psychology, University of Oslo, Norway ; Norwegian Center of Excellence for Mental Disorders Research, University of Oslo, Norway
Bortolon, Catherine ; Université Grenoble-Alpes, Laboratoire Interuniversitaire de Psychologie (LIP/PC2S), France ; C3R Centre Référent Réhabilitation Psychosociale et Remédiation, Centre Hospitalier Alpes-Isère, Grenoble, France
Language :
English
Title :
Translation and Validation of the French Version of the Revised Green et al., Paranoid Thoughts Scale (R-GPTS) in Two Samples: Non-Clinical and Clinical Adults.
This research was funded by the Belgian Fund for Scientific Research (F.R.S.-FNRS, Belgium) (PDR T.0148.20). The authors thank Kevin Noiroux, Zofia Laubitz and Caroline Ziane Translation for their translations of the R-GPTS. Thank you to the persons who evaluated the preliminary version of the French R-GPTS.
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