This tutorial will provide you with a conceptual overview of Relational Frame Theory1,2 or RFT, which is a psychological theory about human language and cognition. It is based on principles of learning, and tries to provide a useful account of how people learn and use language. After completing this tutorial, you should be able to identify the core concepts of RFT, understand how these concepts are used to account for the richness and complexity of human language, and use these concepts to analyze language-related behavior. Go on to the next page to get this party started.