6. The method of claim 1 , wherein determining a winning and losing score improvement list in the selected pair from the respective ordered search results and the user selection data associated with the search query comprises: selecting a user preferred search result in the one or more search results associated with a search query from the search query data based on the user selection data associated with the search query; determining that the user preferred search result has a higher score in a first ordered search results of the respective ordered search results responsive to the search query for each score improvement list; and assigning the score improvement list that identified the first ordered search results as the winning score improvement list.
6. The method of claim 1 , wherein determining a winning and losing score improvement list in the selected pair from the respective ordered search results and the user selection data associated with the search query comprises: selecting a user preferred search result in the one or more search results associated with a search query from the search query data based on the user selection data associated with the search query; determining that the user preferred search result has a higher score in a first ordered search results of the respective ordered search results responsive to the search query for each score improvement list; and assigning the score improvement list that identified the first ordered search results as the winning score improvement list. 7. The method of claim 6 , wherein selecting the user preferred search result comprises selecting a search result of the one or more search results that has been selected by a majority of users, or selecting a search result of the one or more search results with greatest user time spent on the resource associated with the search result.