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Relevance 10/10Quality and QAIntermediate8 min read
Inter-Annotator Agreement (IAA)
Inter-Annotator Agreement measures how consistently multiple annotators label the same sample using the same guideline.
Why it matters for annotators
Low agreement usually signals unclear guidance or inconsistent interpretation and leads to noisy training data.
Visual mental model
Shared sample -> multiple labels -> disagreement analysis -> guideline improvement.
Examples (bad vs good)
Scenario: Real annotation scenario involving Inter-Annotator Agreement (IAA)
Bad: Labeling quickly without applying project rubric.
Good: Applying rubric criteria, documenting rationale, and escalating uncertainty.
Common mistakes
- Skipping guideline details for edge cases.
- Applying inconsistent criteria across similar samples.
- Avoiding escalation even when uncertain.
Submission checklist
- Read the latest guideline update before each batch.
- Apply rubric dimensions explicitly in each decision.
- Escalate ambiguous items with concise rationale.