The Russian psychologist and scientist made a major contribution to the systematic approach to the study of personality, the study of the problems of developmental and differential psychology. Theory and discovery: Ananiev developed a systematic approach to understanding personality that takes into account the relationship between different aspects of mental development. He also studied the problems of developmental and differential psychology. Significance of the works: Ananyev’s concepts contributed to the development of an integrated approach to the understanding of personality and the relationship between various aspects of mental development.