In this groundbreaking work, psychiatrist Dr. Eric Berne introduces a new method for understanding and analyzing human behavior, known as transactional analysis or "TA", which examines the interactions, or "transactions," between individuals and the ways in which they change in response to each other. Core to TA is the thesis that humans, as social organisms, are capable of adapting and changing in response to others. Though developed more than a half century ago, TA continues to shape the field of psychiatry and remains required reading for anyone investing the subject.