“Instrumental” referred to the basically mediated nature of all complex psychological functions. Unlike basic reflexes, which can be characterized by a stimulus—response process, higher functions incorporate auxiliary stimuli, which are typically produced by the person himself … The “cultural” aspect of Vygotsky’s theory involved the socially structured ways in which society organizes the kinds of tasks that the growing child faces and the kinds of tools, both mental and physical, that the young child is provided to master those tasks … The “historical” element merged into the cultural one. (Luria, 1979, p. 44)