The purpose of this paper was to describe psychological reactance theory in detail and to discuss and refine the theory. The paper consists of following five parts. 1. Introduction: An overall explanation of J. W. Brehm's psychological reactance theory with an in-depth discussion. 2. The world of psychological reactance: (1) Psychological reactance in daily life situations. (2) Definition of psychological reactance. 3. The concepts of freedom in psychological reactance theory: (1) How we know and feel what freedom is. (2) Freedom of behavior. (3) The nature of freedom. 4. Types of obstruction of freedom: (1) Threats to and elimination of freedom. (2) Personal and impersonal obstruction of freedom. (3) The meaning of classifying obstruct...