The IJOM is attempting to draw up a set of standards and policies that would make it possible for clinicians to pool their data into a nationwide research project concerning the efficacy of therapy for tongue thrust. The difficult part of this kind of research is the inclusion of a control group. Two problems immediately present themselves: (1) The choice and application of appropriate statistical procedures; and (2) the ethical questions of withholding treatment from a group of patients who need it. Monte Smith has written four articles which provide insight into both these problems. Dr. Smith's series of articles will help us with both problems. I think you will find them very readable, understandable and helpful. [excerpt of introduction by Marvin L. Hanson]
Smith, M. D. (1977). Experimental evaluation of social programs, International Journal of Oral Myology, 3 (4), 5-12.