The European Portuguese version of the Brief Negative Symptom Scale

• Author(s): Castro Santos, Henrique ; Rodrigues, Alexandra ; Ferreira, Sara ; Martins, João Malhadas ; Baptista, Tiago ; Marques, João Gama ; Kirkpatrick, Brian ; Prata, Diana
• Date: 2024
• Persistent ID: http://hdl.handle.net/10451/63005
• Origin: Repositório da Universidade de Lisboa
• Subject(s): Negative symptoms; Positive and Negative Syndrome Scale; Psychosis; Schizoaffective disorder; Schizophrenia
• Document Type: Journal article
• Language: English
• Contributor(s): Repositório Científico de Acesso Aberto da ULisboa

Description

Negative symptoms reflect a currently much-untreated loss of normal functioning and are frequently found in psychotic disorders. We present the first translation of the Brief Negative Symptom Scale (BNSS) to European Portuguese and evaluate its validity in a sample of Portuguese male patients with a psychotic spectrum disorder. The Portuguese BNSS showed excellent internal consistency, high convergent validity (i.e., strong correlation with the PANSS negative factor), and high discriminant validity (i.e., a lack of association with the PANSS positive factor). In sum, the present European Portuguese BNSS has shown to be reliable, thus extending this instrument's clinical availability worldwide.