When people interact in ways not assertive and assertive, it fosters a transaction, where one meets another. The study of these transactions is called transactional analysis (TA). Transactions are defined as stimulus-response exchanges between specific ego states of different people. A transaction involving a single stimulus and a single response, verbal or nonverbal, is the unit of social action. Transactional Analysis is a theory of personality and human relationships with their own philosophy, developed in the 1950s in the United States by Eric Berne, psychiatrist and neurologist, who rejects the model of "healthy and sick" of his fellow psychoanalysts , who establish the doctor-patient relationship. Its application to ordinary interactions became apparent very early and was reported by Berne's book Games People Play (1964), as well as the works of Harris, Jongeward and others. The aim of transactional analysis is a better understanding of how people relate to each other, so as to improve communication and relationships. (Source: Celina Dubin).
The AT offers useful tools to explain the behaviors of self and others., Options and effective means for conflict resolution, human, basic, simple and clear, through a series of tools for diagnosis, intervention and evaluation of the psychological reality origin, Dr. Eric Berne (1910-1970), psychiatrist, was the founder, principal and innovative creator of transactional analysis. Developed his model based on their observations of group psychotherapy in the early fifties. In preparing acknowledges the influence of his teachers Paul Federn and Erik Erikson (trance), with whom he psychoanalyzed. He was always respectful of psychoanalytic theories in which it formed.