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French Validation of the Brief Negative Symptom Scale (BNSS)
Lucie Métivier1,2, Maxime Tréhout1,2,3, Elise Leroux1,2
1Normandie Univ, UNICAEN, PhIND, UMR-S 1237, Caen, France.
Summary
The French Brief Negative Symptom Scale (BNSS) effectively measures negative symptoms in schizophrenia patients. This validated tool shows excellent reliability for clinical and research use in assessing patient conditions.
Area of Science:
- Psychiatry
- Clinical Psychology
- Psychometrics
Background:
- Negative symptoms are a core feature of schizophrenia and schizoaffective disorder, significantly impacting patient functioning.
- Accurate assessment of negative symptoms is crucial for treatment evaluation and clinical management.
- Existing scales may have limitations, necessitating the validation of culturally adapted instruments like the French BNSS.
Purpose of the Study:
- To validate the French version of the Brief Negative Symptom Scale (BNSS) in patients with schizophrenia or schizoaffective disorder.
- To assess the psychometric properties, including internal consistency, structural validity, and construct validity, of the French BNSS.
- To establish the utility of the French BNSS for clinical and research applications.
Main Methods:
- A cohort of 73 patients diagnosed with schizophrenia or schizoaffective disorder was recruited.
- Participants completed the French BNSS, the Positive and Negative Syndrome Scale (PANSS), and the Self-Evaluation of Negative Symptoms (SNS).
- Psychometric properties were evaluated using Cronbach's alpha for internal consistency, exploratory factor analysis for structural validity, and Spearman correlations for construct validity.
Main Results:
- The French BNSS demonstrated excellent internal consistency (Cronbach's alpha = 0.93).
- Exploratory factor analysis identified two dimensions: motivation and expression of negative symptoms.
- Strong positive correlations were observed between the BNSS and the PANSS negative subscale (Rho=0.77) and SNS scores (Rho=0.55), supporting construct validity.
Conclusions:
- The French version of the BNSS exhibits robust psychometric properties, confirming its validity.
- The scale is suitable for reliable assessment of negative symptoms in French-speaking clinical and research settings.
- The BNSS provides a valuable tool for evaluating negative symptoms in schizophrenia and related disorders.
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