Diagnosis and Clinical Measurement in Psychiatry: A Reference Manual for ScanIn order to help people with a mental illness it is important to be able to understand and measure the severity of distressing and disabling experiences that can affect behavior. SCAN is a form of interview, found acceptable to patients, which provides a detailed and accurate picture of the mental state. When analyzed by computer, SCAN provides diagnoses that are comparable wherever the system is used. The ninth edition of the Present State