A psychologist is a licensed professional who specializes in the assessment and treatment of psychological and behavioral issues. They may work at medical facilities providing in-patient or out-patient services, partnering as needed with other medical experts, and facilitating group sessions. Their duties include researching a patient's medical history, doing preliminary evaluations and examinations, supervising interviews, creating care and intervention methods, and evaluating patients' progress. This position requires a Doctorate in Psychology (PhD, EdD, PsyD) as well as licensure in the state where they practice and passage of the EPPP (Examination for Professional Practice in Psychology).