DURING THE TWO YEARS which have elapsed since the lastPsychological Conference, Soviet psychologists have carried outa considerable amount of work which has contributed towards the development of psychology as a materialist science. But we must not overestimate the degree of success achieved. The recent advances have not yet yielded sufficiently tangible results to justify the claim that gaps in theory and in its application to practice have been closed. Psychology is still not satisfying the demands made upon it.