Dr. Jacques Vallee made some comments in a recent interview about abduction researchers and the use of hypnosis with which I am in full agreement:
"I have studied over 70 abduction cases, in concert with psychiatrists trained in the use of the clinical hypnosis. These specialists were uniformly horrified when I showed them what some ufologists were doing and claiming on the basis of the regressions they were performing. In case after case, it becomes obvious that hypnosis is NOT a good way to bring back true memories. The psychiatric literature confirms this. In his famous book “The Fifty-Minute Hour,” Dr. Lindner explains why he considered, and then rejected, the use of hypnosis when asked by the FBI to treat a senior engineer who claimed to travel psychically to other planets. Hypnosis can turn a possible fantasy into an experience that becomes irreversible. I have received pathetic letters from famous UFO abductees asking me to help them find a new form of treatment, because they continue to experience traumatic experiences that do not fit into the rigid abduction model. Unfortunately these people cannot be re-hypnotized in a professional manner after they have been subjected to the ludicrous process routinely followed in ufology today in the name of “research.” Thousands of abductees have now been regressed hypnotically, and we know nothing more about the nature of the phenomenon, the alleged craft, or the entities associated with them. I still believe the abduction experience is part of the witnesses’ reality, as Dr. Simon told me when we spent two days with Betty and Barney Hill at their place in New Hampshire, but hypnosis, in most cases, is neither the therapy of choice, nor the best way to explore what really happened to them."
The complete interview can be found here. It's well worth a read.