Autor(es): Castro Santos, Henrique ; Rodrigues, Alexandra ; Ferreira, Sara ; Martins, João Malhadas ; Baptista, Tiago ; Marques, João Gama ; Kirkpatrick, Brian ; Prata, Diana
Data: 2024
Identificador Persistente: http://hdl.handle.net/10451/63005
Origem: Repositório da Universidade de Lisboa
Assunto(s): Negative symptoms; Positive and Negative Syndrome Scale; Psychosis; Schizoaffective disorder; Schizophrenia
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.
