Transactional analysis is a theory of psychology that focuses on interpersonal relationships and communication. [1] It was developed in the late 1950s by psychiatrist Eric Berne to help people better understand their own behavior and interactions with others. [2] TA posits that people operate within three ego states - parent, adult, and child - and that healthy communication occurs when all parties interact from their rational adult state. Unhealthy interactions can happen when ego states become rigid or when different ego states interact, such as a parent dominating an adult. Understanding ego states and life positions can provide insight for improving relationships.