The Dodo bird verdict asserts that all effective psychological therapies are equally effective and work because of shared “common factors”. It is heavily debated.
Another Dodo bird verdict could also be said to apply to evaluation methods. I don’t believe that all methods are equally good; however, some do, and it might be handy to have a name for the position.
Here’s the section of Alice’s Adventures in Wonderland that inspired the term:
“What I was going to say,” said the Dodo in an offended tone, “was, that the best thing to get us dry would be a Caucus-race.”
“What is a Caucus-race?” said Alice; not that she wanted much to know, but the Dodo had paused as if it thought that somebody ought to speak, and no one else seemed inclined to say anything.
“Why,” said the Dodo, “the best way to explain it is to do it.” (And, as you might like to try the thing yourself, some winter day, I will tell you how the Dodo managed it.)
First it marked out a race-course, in a sort of circle, (“the exact shape doesn’t matter,” it said,) and then all the party were placed along the course, here and there. There was no “One, two, three, and away,” but they began running when they liked, and left off when they liked, so that it was not easy to know when the race was over. However, when they had been running half an hour or so, and were quite dry again, the Dodo suddenly called out “The race is over!” and they all crowded round it, panting, and asking, “But who has won?”
This question the Dodo could not answer without a great deal of thought, and it sat for a long time with one finger pressed upon its forehead (the position in which you usually see Shakespeare, in the pictures of him), while the rest waited in silence. At last the Dodo said, “Everybody has won, and all must have prizes.”