transactional analysis

(Psychiatrist Berne's definition) (1) a system of psychotherapy based on the analysis of transactions and chains of transactions which occur during treatment sessions; (2) a theory of personality based on the study of specific ego-states; (3) a theory of social action based on the rigorous analysis of transactions into an exhaustive and finite number of classes based on the specific ego-states involved; (4) the analysis of single transactions by means of transactional diagrams (this is transactional analysis proper).

(ITAA definition) a theory of personality and a systematic psychotherapy for personal growth and personal change.