Abstract

Summary The importance of the problem of how to integrate psychology and methodology was rediscovered by Oswald Külpe. He noted that Wundt's psychology was inadequate and that a new methodology was needed to construct an alternative. Külpe made real progress but his program turned out to be quite difficult: he had no appropriate method for integrating the two fields. August Messer tried to fill the gap but failed. The problem was largely dropped due to poor methods at hand for studying it but remained important due to Popper's methodology and de Groot's psychology at least. We may now more effectively return to it by using a bootstrap method