Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Transactional analysis, commonly known as TA to its adherents, is an integrative approach to the theory of psychology and psychotherapy. Integrative because it has elements of psychoanalytic, humanist and cognitive approaches. It was developed by Canadian-born US psychiatrist Eric Berne during the late 1950s. According to the International Transactional Analysis Association TA 'is a theory of personality and a systematic psychotherapy for personal growth and personal change'.