What is Transactional Analysis?

Transactional Analysis (TA) is a model of personality and communication, founded by Eric Berne (1910–1970).
Ego states
Three structural ego states: Parent, Adult, Child. Five functional states — the basis of the egogram and of the Ego-State Lab profile on this site.
The five functional ego states
Controlling Parent — rules, evaluation, correction.
Nurturing Parent — care, support, protection.
Adult — facts, calculation, negotiation.
Free Child — spontaneity, ideas, feelings.
Adapted Child — adaptation to rules and expectations.
Transactions and contract
A transaction is one exchange between ego states. Work starts with a contract: a clear, mutual agreement on a reachable change, stated in plain words. No contract — no work.
Method base
Five fields:
Psychology of project management
Business psychology
Psychology of Transactional Analysis — TA in business
Decision theory
Systems analysis