Probabilistic Model


  • A class of mathematical models that are described in the language of probability without necessarily involving randomness. For example, if we find that three times out of four, when a certain word is used in a document, the document is responsive, then a probabilistic model will include an estimate that the probability that a document containing that word (all other things being equal) is more probably responsive (75%) than non-responsive (25%).  1


  1. Herb Roitblat, Search 2020: The Glossary.