From Wikipedia, the free encyclopedia. Transactional analysis' is a psychoanalytic therapy wherein social transactions are analyzed to determine the ego state of the patient (whether parent-like, childlike, or adult-like) as a basis for understanding behavior.ccording to the International Transactional Analysis Association, TA 'is a theory of personality and a systematic psychotherapy for personal growth and personal change'. 1  As a theory of personality, TA describes how people are structured psychologically.