when two or more psychotherapies seem to yield results with little or no difference.
[W]hen two different types of psychotherapies [for the same condition] have been directly compared — and there are more than 100 such studies — it has often been hard to find any differences between them.
Researchers aptly call this phenomenon the Dodo effect, referring to the Dodo bird in Lewis Carroll's "Alice in Wonderland" who, having presided over a most whimsical race, pronounces everyone a winner."
See article at: NYT 18Jan11 "When Self-Knowledge Is Only the Beginning"
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