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scaffolding-vs-substitution

Properties3
tagscognition, tools, ai
typeconcept
statusseedling

2 min read

Scaffolding vs substitution

Definition here: the split sole-2026-llm-cognitive-virus draws between two forms of external cognitive support. Scaffolding reduces immediate cognitive demand while preserving or increasing the user’s later capacity to do the task. Substitution removes the need to perform the underlying cognitive operation.

The complementary and competitive pair

Following Krakauer (2016), the paper maps the split onto complementary and competitive cognitive artifacts. A complementary artifact strengthens capacities beyond its immediate use; a competitive one improves performance while potentially weakening the skill underneath. An LLM can be a tutor whose arguments the user reconstructs, challenges, and verifies, or a substitute that does synthesis, evaluation, and composition on the user’s behalf.

The withdrawal test

The paper’s operative question is what cognitive capacity remains when the tool is withdrawn. The relevant distinction is therefore between forms of coupling, and it is the same test skill-atrophy-ai applies when it asks what skills survive reliance.

Evidence the paper cites

  • A guided “think first, ChatGPT later” protocol produced higher subsequent independent creativity than unrestricted ChatGPT use (Wong and Qiu, Educational Psychology Review 2026).
  • Unrestricted generative-AI access improved performance while the tool was present and reduced later unaided performance, with constrained use mitigating the drop (Bastani et al., PNAS 2025).
  • Novice programmers struggled to evaluate AI-generated code, the conditions the paper ties to automation bias and superficial competence (Zi et al., FSE 2025).

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