Artificial intelligence · University
Retrieval recall on a labeled evidence set · formula reference
The reference relevance labels and query set define the evaluation; recall does not measure answer correctness.
Formula
The reference relevance labels and query set define the evaluation; recall does not measure answer correctness.
recall = relevant items retrieved / all relevant items
Worked example
A labeled query has 13 relevant documents. A retriever finds 9 of them. Calculate retrieval recall. Round the final result to 4 decimal places if needed.
Use 9/13. Duplicated retrieved documents are not counted twice.
0.6923
Prerequisites and checking
Algebra and the topic definitions. Keep units and rounding consistent. State the model conditions before applying the formula.
Further reading and review references
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