In the current paper, we attempt to show how both the basic and applied sciences of behavior analysis have been transformed by the modern research agenda in human language
and cognition, known as Relational Frame Theory (RFT). At the level of basic process, the paper argues that the burgeoning literature on derived stimulus relations calls for a reinterpretation of complex human behavior that extends beyond a purely contingencybased analysis. Specifically, the paper aims to show how a more complete account of complex human behavior includes an analysis of relational frames, relational networks, relating relations, rules, perspective-taking, and the concept of self. According to the theory, this analysis gives rise to a new interpretation of human psychopathology that
necessarily transforms the applied science of behavior therapy. The current paper is divided into three parts. In Part 1, we provide a brief summary of the integrated history
of behavioral psychology and behavior therap...