A 'dogmatism scale' designed to test the individual's private network of political, religious, philosophical, and scientific beliefs was administered to various medical groups, to determine the flexibility of one's belief systems. The level of dogmatism was found to decrease during college and medical school. Psychiatric residents, the least dogmatic of all groups tested, showed relatively less dogmatism than their medical and surgical counterparts. Board qualified specialists—surgeons, internists, psychiatrists, psychoanalysts, scientists in industry, industrial department heads—all rated about the same.