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Published online by Cambridge University Press: 22 December 2008
This article deals with extensions of Vygotsky's (1978) theory of learning in the zone of proximal development. First, affect is added as an additional prerequisite Wertsch's (1979) extended version of it. Then, learning in the zone of proximal development is applied to communicative development. Finally, four main levels in the development from interindividual to intraindividual functioning of communication in the child are distinguished and exemplified.