Psychometric investigation of the French version of the Aberrant Salience Inventory (ASI): differentiating patients with
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PRIMARY RESEARCH
Annals of General Psychiatry Open Access
Psychometric investigation of the French version of the Aberrant Salience Inventory (ASI): differentiating patients with psychosis, patients with other psychiatric diagnoses and non‑clinical participants Philippe Golay1,2,3* , Julien Laloyaux4, Mihaela Moga1, Clara Della Libera4, Frank Larøi4,5,6 and Charles Bonsack1
Abstract During the prodromal phase of psychosis, individuals may experience an aberrant attribution of salience to irrelevant stimuli. The concept of aberrant salience has been hypothesized to be a central mechanism in the emergence and maintenance of psychosis. The 29-item Aberrant Salience Inventory (ASI) was designed to measure five aspects of aberrant salience. The aim of this study was to investigate the psychometric properties of the French version of the ASI comparing patients with psychosis, patients with other diagnosis and healthy, non-clinical participants. The French-language ASI was adapted using the back-translation procedure. Two hundred and eighty-two participants issued from the general population and 150 psychiatric patients were evaluated. Internal validity was assessed using a two-parameter logistic item response model. Reliability was estimated using a test–retest procedure. Convergent validity was estimated using correlations between the ASI scores and several other scales. Sensitivity was evaluated by comparing the scores of participants with a diagnosis of psychosis, patients with other diagnoses and the general population. The best model distinguished three factors: Enhanced Interpretation and Emotionality, Sharpening of Senses and Heightened Cognition. Reliability and convergent validity estimates were good in both groups. The Sharpening of Senses factor was able to discriminate between patients and the general population. Only the Heightened Cognition factor was able to discriminate patients with psychosis from the other psychiatric patients. The ASI is a valid and reliable tool to study not only the aberrant salience phenomenon in patients with psychosis, but also with other diagnoses and within the general population. Keywords: Aberrant salience, Questionnaire, Psychotic proneness, Validity, Reliability, French validation Introduction Schizophrenia is a neurodevelopmental disorder affecting about 1% of the world population and reflecting a convergence of genetic risk factors and early life stress *Correspondence: [email protected] 1 Community Psychiatry Service, Department of Psychiatry, Lausanne University Hospital and University of Lausanne, Consultations de Chauderon, Lausanne, Switzerland Full list of author information is available at the end of the article
[9, 20]. The clinical characteristic of schizophrenia is psychosis, that includes experiences such as hallucinations (aberrant perceptions) and delusions (fixed, false beliefs) [6, 23]. Previous research has shown that psychosis emerges gradually, with a prodromal phase which varies in duration from several weeks to several years or longer [38]. Du
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