TA was founded by Eric Berne in the 1950's and 1960's. Berne's vision was to make psychotherapy accessible to the lay person. To move away from the doctor/patient relationship and to enable the client to have insight into their own process. Thus offering an open and equal relationship.
Since then, Transactional Analysis has developed vastly, integrating humanistic, psychodynamic and cognitive behavioural models.
In the last two decades, Relational Transactional Analysts have re- embraced Eric Berne's original psychoanalytical roots, by considering the transferential phenomena in relational dynamics.