Henrique Castro Santos, Alexandra Rodrigues, Sara Ferreira, João Malhadas Martins, Tiago Baptista, João Gama Marques, Brian Kirkpatrick, Diana Prata
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)...
June 5, 2023: Psychopathology