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Both the Harvard and Stanford studies are inconclusive, as the experimenters themselves recognize. Part of the problem in trying to document the psychological effects of TM, says the British medical journal Lancet, is that it is "difficult to exclude the effects of suggestion." So difficult, in fact, that TM's true value—or lack of it—seems likely to remain in doubt for a long time.
* Including the Beatles, though they helped make the maharishi famous by embracing TM.