Preliminary psychometric properties of the brief Negative Symptom Scale in youth at Clinical High-Risk for psychosis.

Preliminary psychometric properties of an adapted version of the Brief Negative Symptom Scale (BNSS) are reported in youth at Clinical High-Risk for psychosis (CHR). Participants included 29 CHR youth who met criteria for a prodromal syndrome on the Structured Interview for Prodromal Syndromes (SIPS). The adapted BNSS demonstrated excellent internal consistency, convergent validity, and discriminant validity, suggesting that the BNSS has utility for assessing negative symptoms in a CHR population.