Searchplex ID Retrieval terminology registry

Method

Score Normalization

Canonical ID https://id.searchplex.net/score-normalization/

A method for transforming scores from one or more retrieval or ranking systems onto a scale intended to make them comparable or combinable.

Also called

  • Score Normalisation
  • Score Scaling

Scope

Score normalization is commonly used before weighted score fusion in hybrid retrieval. It is a score-preparation step, not the fusion method itself, and it is distinct from rank-based methods such as Reciprocal Rank Fusion.

Observed terms

  • Linear Normalization industry
  • Min-Max Normalization academic
  • Z-Score Normalization academic

Not equivalent to

  • Score Normalization is not Hybrid Retrieval. Score normalization may be used inside a hybrid retrieval system, but hybrid retrieval is the broader combination of retrieval signals.
  • Score Normalization is not Reciprocal Rank Fusion. RRF combines rank positions and avoids relying on comparable raw scores; score normalization transforms numerical scores.
  • Score Normalization is not Score Fusion. Score normalization prepares scores for comparison or combination; score fusion combines the normalized or calibrated scores.

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