The Thai version of the Positive and Negative Syndrome Scale (PANSS) for schizophrenia: criterion validity and interrater reliability.

The Positive and Negative Syndrome Scale or PANSS is a standardized instrument for the measurement of positive and negative symptoms of schizophrenia. The PANSS was widely accepted by researchers and was translated into many languages. It is now translated into Thai, the PANSS-T. The PANSS-T was carefully assessed for its reliability and criterion validity in relation to the PANSS in Thai schizophrenic patients. The results were satisfactory. The PANSS-T can now be used by Thai researchers in clinical studies of schizophrenia that involve the measurement of positive and negative symptoms.