Consensus in psychotherapy research and practice: Where have all the findings gone?

This article examines the issue of why the held of psychotherapy, now approximately 100 years old, has had difficulty in accumulating an agreed-upon body of clinical and research findings. Among the reasons discussed are the gap that exists between research and practice; the different theoretical approaches that have been taken in the attempt to understand psychotherapy; the language barriers that characterize the field; the changing nature of our research methodology; the value attached to contributions that are new; and the rules that govern scientific behavior. What is needed to build upon, rather than rediscover what we already know, is presented.