The task force indicated that they felt the best way to answer the charge to them was to provide a review of the literature on attempted change of sexual orientation. So the next chapter of the report reviews the methodological issues present in the existing research. The authors also set up the criteria upon which they based their review (such as inclusion/exclusion criteria).
Many people, myself included, have been quite clear that there are definitely methodological limitations in this older research. After all, much of the research was conducted in the 1950s-1970s. The studies were conducted in keeping with the standards of the day, so we want to be careful to keep that in mind when critiquing them from that standpoint. It has also been said that poor methodology does not disprove success.
It is interesting to note, too, that many current textbooks still cite older studies with similar methodologies as evidence for the effectiveness of other approaches to therapy. I remember looking into this several years ago, and one leading family therapy textbook cited studies from the 1970s and 1980s that had similar methodological concerns as evidence for the effectiveness of widely practiced models of family therapy. I think people who feel that the task force unfairly applied rigorous standards to this literature may feel that a similar standard would sink many other therapy models for a wide range of practices. On the other hand, I think those who provide such scrutiny point out the potential for misleading and harmful outcomes are greater given the topic.
On the question of standards being applied consistently, one other observation that has been made about the report is that the task force used different standards when reviewing the evidence about change of orientation than when they looked at the question of harm or how normal homosexuality is or other issues. On these other matters, they cited studies that had significant methodological limitations.
I do agree that it is important that better studies are developed and conducted, particularly if clinicians provide change of orientation therapy. As with so much of counseling and psychotherapy, there is a need to conduct more and better studies on various treatment models.