| 摘要 |
A method and system for assessing the quality of one or more search engines are provided. The method and system monitor reformulation sessions by users ( 201 ) of a search engine ( 308, 402, 403 ) by retrieving data from a query log ( 307, 407, 408 ), wherein a reformulation session is a series of at least two queries to a search engine ( 308 ) issued by a user ( 201 ) to satisfy a single information need. The method and system then determine a reformulation session parameter for the search engine ( 308, 402, 403 ) and analyse the reformulation session parameter. The reformulation session parameter may be a rate of query reformulations in a reformulation session or a reformulation session duration. Analysing the reformulation session parameter for a single search engine may determine if the parameter changes with time or may determine the parameter with different settings in a single search engine. Analysing the reformulation session parameter for two or more search engines includes comparing the parameters of the two or more search engines to measure the search quality. The analysis can be used to control the operation of one or more search engines.
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