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Unformatted text preview: ser happiness with the results returned §༊  Relevance of results to user’s informa*on need 69 Introduc)on to Informa)on Retrieval Sec. 8.1 Evalua*ng an IR system §༊  An informa(on need is translated into a query §༊  Relevance is assessed rela*ve to the informa(on need not the query §༊  E.g., Informa*on need: I’m looking for informa)on on whether drinking red wine is more effec)ve at reducing your risk of heart aZacks than white wine. §༊  Query: wine red white heart a+ack effec/ve §༊  You evaluate whether the doc addresses the informa*on need, not whether it has these words 70 Introduc)on to Informa)on Retrieval Sec. 8.4 Evalua*ng ranked results §༊  Evalua*on of a result set: §༊  If we have §༊  a benchmark document collec*on §༊  a benchmark set of queries §༊  assessor...
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