Transactional analysis (psychology) is a great tool for understanding how human functions in social situations. It was developed by American psychiatrist Eric Berne in the late 1950.
TA (Transactional analysis) is a theory of personality which claims that every individual has personality split in 3 parts: Parent, Adult and Child. Berne calls it Parent-Adult-Child model or shortly named P-A-C. PAC represents personality ego states and is a core part for understanding transactional analysis.
Our current emotional state depends in which ego state (personality mode) we currently operate.
Understand the model of P-A-C allows us to gain more control over our behavior and social transactions, and by having more understanding in which ego state we currently operate allows us to strengthen our adult, which is responsible for making rational predictions according to our life situation.
Parent is a state in which people unconsciously feel, behave, think and response in a way how they interpreted their parents to behave.
Child is a state in which people behave, feel and response similar to how they did in their childhood. It is responsible for emotions, recreation, creation, spontaneity and intimacy.
Every individual has different recordings of his past which determine definition of his ego states. Some people have specific parts of ego more dominantly defined or contaminated together and this results in different abilities to handle life reality.