Protocol
Standardize irrelevant context across cases
If the paper color should not matter, do not let it become a hidden experimental variable.
When it fits
- Judgments should depend on case content but may also be influenced by order, formatting, identity or presentation differences.
When to avoid it
- Never blind information that is actually required for safety, authorization, legal context or legitimate interpretation.
Why it matters
Identify context features that should not influence the judgment and hold them constant or randomize them across cases. Use the same information order and presentation where comparison matters. When identity or source status is not decision-relevant, blind it during the initial judgment if operationally and ethically appropriate.
Steps
- Which presentation details should have zero influence on this judgment?
- Can they be standardized or randomized?
- Is reviewer order exposing later cases to fatigue or learning effects?
- Does identity need to be visible for the decision itself?
An example
Present candidate incident reports in the same structure and randomize order instead of placing the most politically visible case first.
Check your result
A case would receive the same intended evidence even if its non-relevant presentation details changed.
Keep this limit in mind
- Never blind information that is actually required for safety, authorization, legal context or legitimate interpretation.
Connected ideas
Useful withRun a duplicate-case noise audit
Evidence and sources
Decision-noise research distinguishes level noise, stable pattern noise and occasion noise, which arise from different sources and require different diagnostics.
The taxonomy is a conceptual model; real systems can contain several forms of noise at once.
Human judgment error in the intensive care unit: a perspective on bias and noise · Noise taxonomy