Evaluations of LGATs
Finkelstein noted the many difficulties in evaluating LGATs, from proponents' explicit rejection of certain study models to difficulty in establishing a rigorous control group. In some cases, organizations under study have partially funded research into themselves.
Not all professional researchers view LGATs favorably. Researchers such as psychologist Philip Cushman, for example, found that the program he studied "consists of a pre-meditated attack on the self". A 1983 study on Lifespring found that "although participants often experience a heightened sense of well-being as a consequence of the training, the phenomenon is essentially pathological", meaning that, in the program studied, "the training systematically undermines ego functioning and promotes regression to the extent that reality testing is significantly impaired". Lieberman's 1987 study, funded partially by Lifespring, noted that 5 out of a sample of 289 participants experienced "stress reactions" including one "transitory psychotic episode". He commented: "Whether would have experienced such stress under other conditions cannot be answered. The clinical evidence, however, is that the reactions were directly attributable to the large group awareness training."
In Coon's psychology textbook (Introduction to Psychology) the author references many other studies, which postulate that many of the "claimed benefits" of Large Group Awareness Training actually take the form of "a kind of therapy placebo effect". DuMerton writes that "... there is a lack of scientific evidence to quantify the longer-term positive outcomes and changes objectively ..." Jarvis described Large Group Awareness Training as "educationally dubious" in the 2002 book The Theory & Practice of Teaching.
Tapper mentions that "some large group-awareness training and psychotherapy groups" exemplify non-religious "cults". Benjamin criticizes LGAT groups for their high prices and spiritual subtleties. In an academic research-paper on "Choices", a type of LGAT, researchers credited LGAT programs with having had perhaps a million American attendees, many of whom gave positive testimonials of "healing effects" and "positive outcomes in their lives".
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