Questions tagged [information-retrieval]

Information Retrieval is an area of study concerning with retrieving documents, information or metadata from a collection of unstructured or semi-structured data.

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Why use (k+1) instead of k in numerator of BM25 scoring formula [closed]

BM25 uses this nonlinear transformation to scale the term frequency: where x is a term frequency. Why is k+1 used in numerator instead of just k? Wouldn't formula below work equally well? It is ...
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What percentage of words or queries are misspelled in search queries?

What percentage of words or queries are misspelled in search queries? I couldn't find any decently recent study. {3} states: Dalianis measured that 10% of web search engine queries were misspelled ...