Psychologists are Ph.D.'s.
Psychologists tend to have greater expertise in psychometric testing such as the MMPI or Rorschach tests. There are other practitioners of psychotherapy such as licensed clinical workers and marriage, family and child counselors. Psychiatrists attend four years of post-graduate education following medical school in order to become board eligible. Approximately half of psychiatrists who have completed their training go on to become certified by the American Board of Psychiatry and Neurology. Forensic psychiatry is the application of medical mental health expertise for legal purposes.