Transactional Analysis (TA) is a theory developed by Eric Berne that views personality as composed of three ego states - Parent, Adult, and Child. Berne proposed that people communicate through transactions between these ego states. Straight transactions are healthy, while crossed transactions are less so. Berne also introduced the concepts of strokes, life scripts, existential positions, and games - patterns of transactions used to meet psychological needs. TA aims to bring awareness to ego states and transactional patterns to improve communication and relationships.