Ideas of activity are widely used in the contemporary literature on psychology and methodology. It seems that everyone understands well what is being said. Nevertheless, one can claim that there is a methodological problem in connection with the idea of activity. Various researchers not only interpret activity differently but, what is more important, assess of the place of this category in knowledge differently. From the perspective of some researchers, activity is one way of describing and explaining reality. Others believe that the category of activity presents reality itself, that there is nothing but activity. If we adhere to the former point of view, we can raise the question, for example, of studying certain types of activity, as V.V. Davydov does (he points out that so far there has been little research on the origin and historical development of such types of activity as artistic and educational activity and that the cultural-historical aspects of activity have not been adequately studied [5, pp. 28-29]).