AI Glossary

F1 score

Also called F1 measure, F-measure

What does “F1 score” mean?

F1 score: The harmonic mean of precision and recall. It falls when either metric is low, which makes it useful when both missed cases and false alarms matter.

F1 score visual guide: The harmonic mean of precision and recall. It falls when either metric is low, which makes it useful when both missed cases and false alarms matter.
Visual guide Open full size (new tab)

What is an example of “F1 score”?

A spam filter with very high precision and poor recall gets a lower F1 score than either metric alone might suggest.

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See also

PrecisionTermRecallTermConfusion matrixTerm

Same topic

FairnessTermExplainabilityTermFalse negativeTermExact match scoreTermFalse positiveTerm