2004'1, p.35
Elkonin B. D.
Action as a unit of development

On the basis of D.B. Elkonin's ideas on meaningful and operational aspects of an action the author analyzes sociocultural prototypes of the action proving that the trial action is a unit of human development. The author also discusses basic notions of developmental psychology, such as the ideal form, the event, screening as the content of the trial action.