“…However, if the criticisms of Meehl, Cohen, and others have any merit, and the dominant research tradition is incapable of delivering cumulatively effective scientific knowledge, then the field of cognitive-behaviour therapy has reason to be concerned that it has adopted this research tradition in such a wholesale and unquestioning way. This paper argues, yet again (e.g., Ballard, 1986;Barlow, Hayes, & Nelson, 1984;Bushnell, 1984;Nelson-Gray, 1994) that research and practice in behaviour therapy will benefit greatly from adopting and maintaining the use of single-case research practices as a dominant, but not necessarily exclusive, research methodology. Before doing so, however, the nomenclature used in discussing these research designs needs clarification.…”