Editor's Introduction

In studying higher nervous activity in man, analysis of the function of generalization is of particular significance. It was noted by I. M. Sechenov that inasmuch as the nervous system is usually influenced by complexes of stimuli, every external object is fixed in and reproduced by the nervous system not as a separate phenomenon, but as an element of a spatial group or term in a series (6), i. e., as part of a dynamic system.