According to Ananiev, human psychic development manifests itself in three expressly separated planes:

• Ontogenetic evolution of psycho-physiological functions (Man and Nature bias).

• Life journey – personality history (Man and Society bias).

• Development of man's activities as an agent of labour, cognition and communication (Man and Civilization bias).

Thus the process of human development is biased by the laws of Nature, Society and Civilization, relatively independently and potentially in contradiction. There is no Universal Law of human development, there is only a number of relatively independent factors, and their influence is mediated and integrated by the human individuality to constitute a holistic structure of the human psyche. It is the individuality which determines the vector, direction and route of development. Individuality from early age manifests itself by refracting and combining Nature, Culture and Civilization. In mature age, the individuality factor becomes dominant, determining individual development of psychophysiological functions in adulthood.

A human being in Ananiev's theory stands out as, first, a historically concrete type, specific in its psychic organization in different moments of history, as Vygotsky stressed and second, as a self-determining creator of one's own self in the tradition of Rubinstein.

Ananiev's theory also stands out for its' humanistic appeal. Being mainly concerned with striking social effects on human biology, he was very well aware of the natural limits of this flexibility. He believed the main practical aim of psychological science is to help the individual in seeking his unique way of coping with the situation and himself, becoming the master of his own life and obtaining individual harmony.

Ananiev's theory remains mainly unknown to the scientific community outside Russia. At the same time, Ananiev's methodology and theory seem to be fruitful even nowadays within the intensively developing areas of the world's psychological science. Among the areas of research and topical issues may be named, alongside the impact of personality on psycho-physiological functions, the areas of life-span human development, analysis of development in various age periods from the point of view of the holistic context of human life, and age dynamics in adulthood.

Conclusion

Activity theory is the trend which shaped the development of psychological science in Russia throughout the Soviet period. It is based on the ideas of the procreative role of vital activity of a living being for psyche formation. Its representation in English-speaking science is depleted by not enough light being shed upon the complex and dialectic nature of the trend. A general tendency to unambiguous reduction of AT to the theory of Leontiev – however brilliant the latter is, and however significant is its impact on Russian psychology – impoverishes the creative potentialities and capabilities of the trend.