Map of Romaneche-Thorins on The psychotherapist is an individual who has been professionally trained and licensed (in the United States by a state board) to treat mental, emotional, and behavioral disorders by psychological means. psychotherapeutic adj. psychotic adj. of, relating to, or affected by psychosis or a psychotic DISORDER. psychotic disorder any one of a number of severe mental disorders, regardless of etiology, characterized by gross impairment in reality testing. The accuracy of perceptions and thoughts is incorrectly evaluated, and incorrect inferences are made about external reality, even in the face of contrary evidence. Specific symptoms indicative of psychotic disorders are delusions, hallucinations, and markedly disorganized speech, thought, or behavior; individuals may have little or no insight into their symptoms. Map of Romaneche-Thorins 2016.