Dmitry Leontiev - Ph D., Dr. Sc., Professor, Head of International Laboratory of Positive Psychology of Personality and Motivation, National Research University Higher School of Economics. E-mail: dmleont@gmail.com

Anna Lebedeva - Ph D., Senior Research Fellow, International Laboratory of Positive Psychology of Personality and Motivation, National Research University Higher School of Economics. E-mail: anna.alex.lebedeva@gmail.com

Vasily Kostenko - Research Fellow, International Laboratory of Positive Psychology of Personality and Motivation, National Research University Higher School of Economics. E-mail: vasily.kostenko@gmail.com

Address: 20 Myasnitskaya St., 101000 Moscow, Russian Federation.

The paper presents a theoretical reconstruction of Lev Vygotsky’s project on theory of personality development and highlights Vygotsky’s relevance and heuristic value for the personality psychology of our days, especially positive psychology. The authors focus on several aspects of Vygotsky’s heritage. 1. The general concept of personality within a non-classical framework. 2. The idea of self-mastery as the central explanatory concept and its relation to the modern concept of agency. 3. The role of self-reflective awareness in personality development. 4. Personality development pathways in challenging conditions. In Vygotsky’s works personality was implicitly constructed as the most integral higher mental function, while self-mastery or self-regulation was its central feature. Vygotsky’s principle of mediation states that the structure of human activity is mediated by physical or mental tools that break the S — R links and make it possible to master one’s own behavior and mental processes. By utilizing speech as a system of signs that enables the process of mastering the psychosocial reality, self-reflection makes a new basis for more complicated forms of higher mental processes that possesses more degr ees of freedom as compared with the lower ones. The law of compensation is discussed in the context of aggravated conditions of personality development, where personality answers to social boundaries, and thus achieves alternative trajectories of development. The sociocultural paradigm is thus consistent with modern thought on positive and personality psychology.