1. Vygotsky placed more emphasis on social and cultural influences on cognitive development compared to Piaget, who focused more on universal stages of development.
2. Vygotsky argued that social interaction and language use are important for children's cognitive development, whereas Piaget underestimated these factors.
3. According to Vygotsky, learning occurs within the "zone of proximal development" where children can solve problems with guidance from others, such as teachers, before solving problems independently.