Soviet and Russian psychologist. He studied the problems of the psychology of personality and thinking, the relationship between consciousness and the unconscious, and the intrauterine development of the psyche. His main works are: “Cultural-Historical Theory of Thinking” (1968), “Psychology of Thinking and Cybernetics” (1970), “On the Natural Prerequisites of Human Mental Development” (1977), “Thinking and Forecasting” (1979) and others.