Searchplex ID Retrieval terminology registry

Metric

Mean Average Precision

Canonical ID https://id.searchplex.net/mean-average-precision/

A ranking evaluation metric that averages Average Precision values across a set of queries or topics.

Also called

  • MAP
  • mAP

Scope

MAP summarizes ranked retrieval effectiveness across topics using AP as the per-topic measure. It should not be confused with Average Precision for a single topic or with Precision@K at a fixed cutoff.

Part of family

Evaluates

Not equivalent to

  • Mean Average Precision is not Average Precision. MAP averages Average Precision across queries or topics; AP is the per-query or per-topic value.
  • Mean Average Precision is not Precision@K. MAP averages rank-sensitive AP values across topics; Precision@K only measures precision at a fixed cutoff.

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ID