Developed by psychiatrist Eric Berne and commonly called T.A., Transactional Analysis is a system of psychotherapy that integrates therapeutic techniques of cognitive, humanistic, and Freudian analytical therapies. It is perhaps most popularly known for its simplification of the Freudian concepts of the id, the ego, and the super-ego, which are respectively called the child, parent, and adult. These terms have been adopted by some "pop" psychologists.