Error Type

Since the paired notions of type I errors (Type-1 Error) (or "FalsePositives") and type II errors (Type-2 Error) (or "FalseNegatives") that were introduced by Neyman and Pearson are now widely used, their choice of terminology ("errors of the first kind" and "errors of the second kind"), has led others to suppose that certain sorts of mistake that they have identified might be an "error of the third kind", "fourth kind", etc. None of these proposed categories have been widely accepted. https://en.wikipedia.org/wiki/Type_III_error http://en.wikipedia.org/wiki/Type_I_and_type_II_errors

In 1957, Allyn W. Kimball, a statistician with the Oak Ridge National Laboratory, proposed a different kind of error to stand beside "the first and second types of error in the theory of testing hypotheses". Kimball defined this new "error of the third kind" as being "the error committed by giving the right answer to the Wrong Problem" (1957, p. 134).

In systems theory an additional type III error is often defined: type III (δ): asking the wrong question and using the wrong null hypothesis.

In 1969, the Harvard economist Howard Raiffa jokingly suggested "a candidate for the error of the fourth kind: solving the right problem too late"

"correctly rejecting the null hypothesis for the wrong reason"

cf wicked problem