Who proposed the Zone of Proximal Development as a concept in learning theory?

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The Zone of Proximal Development describes what a learner can do with guidance or collaboration, but not yet on their own. It was proposed by Lev Vygotsky, whose sociocultural perspective centers learning in social interaction and the support of more knowledgeable others. The idea of scaffolding—providing targeted help that lifts a learner to perform a task just beyond their current ability and then gradually removing that support—illustrates how knowledge is built through guided participation and shared problem-solving. For example, a student learning to read unfamiliar words benefits from prompts, questions, and hints from a teacher or peer, enabling progress that becomes internalized over time. This emphasis on social assistance and guided development distinguishes it from Piaget’s focus on independent discovery and stage theory, Skinner’s behaviorist conditioning, and Erikson’s psychosocial stages.