The Main Difference Between Piaget's and Vygotsky's Theories of Development

Multiple Choice

The main difference between Piaget's and Vygotsky's theories of development is that:

A) Vygotsky's theory supplied additional evidence for Piaget's conclusions.
B) Piaget stressed the child's independent discoveries, whereas Vygotsky stressed that supportive interactions with parents and others played a key role in cognitive development.
C) Vygotsky stressed the independent efforts of the child, whereas Piaget stressed formal learning experiences.
D) the stages of cognitive development in Vygotsky's theory occur at much earlier ages than the corresponding stages in Piaget's theory.