SYNTHESIS NOTE
Psychology, Society, and Alignment

How do writers use AI through different creative stages?

This study explores whether writers deploy large language models differently depending on their creative needs—from generating initial ideas to organizing thoughts to drafting final text. Understanding these patterns reveals how humans and AI can complement each other's strengths.

Synthesis note · 2026-03-27 · sourced from Co Writing Collaboration
How do you build domain expertise into general AI models?

LLMs were most intensively used for Ideation when participants initially had no ideas or only a vague picture. If they had existing thoughts, most preferred using the LLM as an Illumination tool to organize, summarize, and reify those thoughts. Once an idea could be articulated, participants experimented during Implementation. The three stages often occurred linearly but the process was iterative — participants returned to Ideation whenever they hit writer's block during Implementation. Unexpected or "failed" LLM outputs from any stage also served as inspiration, implicitly triggering new Ideation.

This maps onto the vault's ideation-evaluation dissociation: since Can LLMs generate more novel ideas than human experts?, the co-writing finding suggests humans naturally use LLMs for what they're good at (combinatorial ideation) while reserving evaluation for themselves. The "second mind" experience described by participants is the custodial relationship in creative form — the human steers, the AI generates, and the human evaluates.

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Original note title

human-AI co-writing follows three creativity stages — ideation illumination and implementation — with iterative return to ideation during writer's block