Modelled after the Hamilton Rating Scale for Depression, the Children’s Depression Rating Scale has long been used to diagnose depression and determine its severity. Now updated and standardized with complete interpretive and psychometric data, this sensitive rating scale is more useful than ever. In clinical settings, it can be used to diagnose depression and monitor treatment response. In nonclinical contexts, such as schools and pediatric clinics, it can be used as a quick and economical screener, identifying children who need professional intervention. The CDRS-R is a brief rating scale based on a semi-structured interview with the child (or an adult informant who knows the child well). Unlike self-report inventories, the CDRS-R not only assesses depression but also takes the first step in the therapeutic process.