Determining the nature of an individual's mental health problem is the first step toward rational and effective intervention. In the case of children and adolescents the critical task of formulating a diagnosis is further complicated by the currently shifting conceptualizations of the nature and determinants of pathology in these age groups. This course will focus on assessing mental disorders in young people according to the DSM-5 classification system with some emphasis on the transition from DSMIV to DSM-5 since many students will still be using DSM IV in their field placements and it is unclear as to when the DSM-5 will be required or included in the licensing exam. The characteristic clinical presentation of each diagnostic group will be presented. Associated family patterns and key issues in interviewing parents will be highlighted. Assessment methodologies including behavioral, psychobiological and systemic will be surveyed. This course will provide a beginning information base for students interested in working with children and adolescents.