ABSTRACT
What do we mean by "replicating therapy"? What do we expect to have to do to be able to replicate therapy, and what issues emerge from attempts to do so? Replicating "successful" therapy is seen as vital in two major respects—both as a means of establishing that the therapy is a genuinely effective form of treatment for a particular disorder, and to give the opportunity to address theoretical issues and areas of uncertainty arising from the original study {Nickels, Byng, & Black, 1989). Replication may take the form of trying the therapy with a different client or clients (in the case of single case studies), or trying the therapy with a group of clients.
