Brainwrite instead of group brainstorm
Have people generate ideas silently and individually first, then pool and build.
Key takeaways
- What it is: Have people generate ideas silently and individually first, then pool and build.
- Why it works: Verbal group brainstorming suffers “production blocking”: only one person can talk at a time, so others wait, forget, and self-censor, and a few voices dominate. Brainwriting removes the blocking by letting everyone generate in parallel and in private first, then combining — capturing the diversity of a group without the loss that talking together imposes.
- Evidence: Backed by randomized trials / meta-analyses.
- Avoid: Running a live verbal brainstorm because it feels energetic and productive — the very format that the evidence shows reduces both the quantity and quality of ideas.
Why it works
Verbal group brainstorming suffers “production blocking”: only one person can talk at a time, so others wait, forget, and self-censor, and a few voices dominate. Brainwriting removes the blocking by letting everyone generate in parallel and in private first, then combining — capturing the diversity of a group without the loss that talking together imposes.
How to do it
- 1Have each person silently write ideas alone, before any discussion.
- 2Pool all the written ideas without attribution.
- 3Only then meet to combine, build on, and evaluate the pooled set together.
What the evidence says
RCT / meta-analysisDecades of research find that “nominal groups” (individuals generating alone, then pooled) produce more and often better ideas than interacting brainstorming groups, primarily because of production blocking. This is the honest, well-replicated caveat about group brainstorming.
Honest caveat: Groups still help for building on and selecting ideas, and for buy-in; the loss is specifically in interactive verbal generation, not in collaboration overall.
- — Diehl & Stroebe (1987), productivity loss in brainstorming groups, J. Personality & Social Psychology
Common mistake
Running a live verbal brainstorm because it feels energetic and productive — the very format that the evidence shows reduces both the quantity and quality of ideas.
IX Coach structures ideation the way the evidence supports — individual generation first, pooling after — so you get the diversity of multiple minds without the production-blocking loss.
Practice this with IX Coach →