Which developmental psychologist emphasized the role of social interaction in language development?

Lev Vygotsky emphasized the critical role of social interaction in language development. His theories revolve around the idea that cognitive development is largely influenced by social interactions and cultural context. Vygotsky proposed that language is a primary tool for thought and that children's language acquisition is deeply intertwined with the experiences they share with more knowledgeable others, such as parents and peers. He introduced concepts like the Zone of Proximal Development, which highlights how social engagement helps children learn and develop new skills and language abilities. This perspective underscores the importance of collaborative dialogue and social participation in fostering language skills, distinguishing Vygotsky's approach from others who may emphasize inherent cognitive structures or individual discovery.