My diatribe against technocentrism and scientism points to one reason we need this new discipline of educology. We need a methodology different from those of other sciences such as educational psychology. To clarify this need, I will take an example from my own work. People have asked, "What is the effect of Logo on learning mathematics -- or on planning skills or whatever?" Some experimenters have come up with very positive answers, some with negative ones. But they are barking up the wrong tree. They are following the methodology of studying the effect of something by varying one thing while keeping everything else constant.