This book investigates the foundational principles of Relational Frame Theory (RFT), a psychological theory of human language and cognition. It outlines the core concepts of RFT, including derived relational responding and its role in psychological processes. The work presents RFT as a functional analytic approach to understanding how humans learn to relate stimuli arbitrarily, forming the basis for complex cognitive functions.

This foundational text is regarded as a key work in the development of Relational Frame Theory, offering a comprehensive overview of its theoretical framework. It is primarily aimed at researchers and clinicians interested in the cognitive and behavioral underpinnings of language. The book provides a detailed account of RFT's principles and its potential applications in understanding complex human psychological phenomena.