CONCEPT
Scaffolding vs Substitution
Gopnik's translation of Vygotsky's zone of proximal development into the age of AI: the question of whether a tool supports the development of capacity or replaces the capacity itself.
The distinction between scaffolding and substitution is the most actionable insight developmental psychology offers to the age of AI. A scaffold is a temporary structure that enables a building to rise — support that allows the learner to exercise capacities that are emerging but not yet fully developed, without replacing the learner's own cognitive labor. A substitute is the opposite: a system that delivers the output without the construction process, leaving the user with the product but not the capacity producing it would have developed. The same AI tool, the same interaction, can function as either — and the difference determines whether the most powerful amplification technology in human history amplifies growth or amplifies dependency.
In The You On AI Field Guide
The scaffolding concept comes from the Russian psychologist Lev Vygotsky, who argued that learning occurs in the zone between what a learner can do independently and what the learner can do with support. Below the zone, the learner is repeating