Functional Adult:

The functional adult — in transactional analysis (TA), developed in the 1950s by psychiatrist Eric Berne — is the adult ego state. It’s the part that thinks, communicates, and makes decisions in real time. It’s characterized by reality-testing, emotional regulation, and the capacity to respond flexibly rather than react automatically. The term emphasizes how the adult operates in practice, especially under stress, rather than the adult as a structural category. Unlike the adaptive adult, the functional adult, by definition, is not governed by childhood adaptations.