This document provides an overview of Transactional Analysis, a model developed by Dr. Eric Berne in the 1960s to explain human behavior and interactions. It describes the three ego states of parent, adult, and child that people operate from. Transactions can be complementary when people engage from compatible ego states, non-complementary when inappropriate states are activated, or ulterior with hidden meanings. Life positions reflect basic beliefs about the self and others. The document also discusses stroking, gaming, and reasons why people play games in interactions.