On the verbal behavior of relational frame theory: A post-skinnerian account of human language and cognition.

The authors of the provocative subtitle, without embarrassment, set out to produce a revolution in the behavioral study of verbal behavior. I first consider their new definition and then suggest avoiding the definitional problem by describing the properties that characterize verbal behavior, including both those that are like nonverbal behavior and those that are unlike it. Conceding that this book is not an easy read, I nevertheless conclude that we all examine its assertions in detail and in research.