What theorist believes that cognitive development proceeds as a result of social interactions in which partners jointly work to solve problems?

Lev Vygotsky believed that cognitive development occurs through social interactions where individuals collaborate to solve problems. According to Vygotsky's sociocultural theory, these interactions play a crucial role in the development of higher mental functions and learning. This collaborative process is known as the zone of proximal development, where individuals learn from more knowledgeable peers or adults.