Article (Scientific journals)
Psychometric properties of the BIRT Motivation Questionnaire (BMQ), a self-measure of avolition in individuals with schizophrenia
Raffard, S.; Norton, J.; Van der Linden, Martial et al.
2022In Journal of Psychiatric Research, 147 (March), p. 274-282
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Keywords :
Avolition; Longitudinal study; Negative symptoms; Self-assessment
Abstract :
[en] Aims: Avolition defined as a lack of interest or engagement in goal-directed behavior plays a key role in everyday functioning in schizophrenia and is considered as one of the main contributors to the burden of disease. The aim of this study was to 1) validate the self-report BIRT Motivation Questionnaire (BMQ-S) seldom used before in schizophrenia 2) examine the degree of agreement between the BMQ-S and its informant-report version 3) to assess its ability to predict real-world outcome at 12 month follow-up. Methods: One hundred and twenty-two (51.9% inpatients) adults with a diagnosis of schizophrenia were included. Exploratory Factor analysis was performed on the BMQ-S to identify the underlying structure. Real life functioning was measured with the Global Assessment of Functioning scale (GAF). Convergent validity was assessed with the Scale for Assessment of Negative Symptom (SANS) and the Lille Apathy Rating Scale (LARS). Results: The main psychometric properties of the BMQ-S (internal consistency, test-retest reliability) were satisfactory. Exploratory factorial analysis revealed a 4-factor model which explained 76% of the overall variance. The BMQ-S correlated significantly with the LARS and the SANS avolition subscore suggesting adequate convergent validity. The correlation between the BMQ-S and the clinician-report version was 0.48. The global score and in particular the Initiation/disorganisation dimension was a significant predictor of global functioning at 12-months even when adjusted for age, chlorpromazine intake and depression. Conclusion: Our findings indicate that the BMQ-S has satisfactory psychometric properties and that schizophrenia patients can reliably assess their lack of motivation. Self-evaluation of avolition should be considered in the overall prediction of real-world functioning in schizophrenia. © 2022 Elsevier Ltd
Disciplines :
Neurosciences & behavior
Author, co-author :
Raffard, S.;  University Department of Adult Psychiatry, Hôpital de la Colombière, CHU Montpellier, Montpellier, France, Univ Paul Valéry Montpellier 3, Univ. Montpellier, EPSYLON EA, Montpellier, France
Norton, J.;  INSERM U1298, Montpellier, France, University of Montpellier, Montpellier, France
Van der Linden, Martial ;  Université de Liège - ULg
Lançon, C.;  Aix-Marseille Univ., Chronic Diseases and Quality of Life - Research Unit, EA 3279 - Public Health, Marseille, 13005, France
Benoit, M.;  Psychiatry - Clinical Neuroscience Department, Pasteur Hospital, University of Nice Sophia-Antipolis, Nice, France
Capdevielle, D.;  University Department of Adult Psychiatry, Hôpital de la Colombière, CHU Montpellier, Montpellier, France, INSERM U1298, Montpellier, France, University of Montpellier, Montpellier, France
Language :
English
Title :
Psychometric properties of the BIRT Motivation Questionnaire (BMQ), a self-measure of avolition in individuals with schizophrenia
Publication date :
2022
Journal title :
Journal of Psychiatric Research
ISSN :
0022-3956
eISSN :
1879-1379
Publisher :
Elsevier, United Kingdom
Volume :
147
Issue :
March
Pages :
274-282
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 01 February 2022

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