FUNCTIONAL DISORDER By N., Sam M.S. - 40 the term given to a disorder that there is no known organic basis. In psychology and psychiatry a functional disorders are improperly considered equivalent to a psychogenic disorder. FUNCTIONAL DISORDER: "Joe had a functional disorder with no cause." Related Psychology Terms Dissociative Identity Disorder CHILD PSYCHIATRY COMMUNITY PSYCHIATRY ORGANICISM (Organic Viewpoint) KRAEPELIN, EMIL (1856-1926) BRAIN DISORDERS CLINICAL PSYCHOLOGY EXOTIC PSYCHOSES SOCIAL PSYCHIATRY GROUP FOR THE ADVANCEMENT OF PSYCHIATRY Cite this page: N., Sam M.S., "FUNCTIONAL DISORDER," in PsychologyDictionary.org, May 11, 2013, https://psychologydictionary.org/functional-disorder/ (accessed June 27, 2022).