13. A method comprising: receiving, at one or more processors, a same search query from a plurality of client devices; identifying, by the one or more processors, search result documents based on the search query; providing, by the one or more processors, information regarding the search result documents to the plurality of client devices; receiving, at the one or more processors, information regarding selections, of the information regarding the search result documents, at the plurality of client devices in connection with the search query; determining, by the one or more processors, that a particular quantity of the selections, for information regarding a particular search result document of the search result documents, is greater than a quantity of the selections for information regarding one or more other search result documents of the search result documents; assigning, by the one or more processors, a value to the particular search result document based on determining that the particular quantity of the selections, for the information regarding the particular search result document, is greater than the quantity of the selections for the information regarding the one or more other search result documents, the value, assigned to the particular search result document, being based on at least one of: a particular period of time, or a respective network address associated with one or more of the plurality of client devices; and using, by the one or more processors, the value as a measure of quality for the particular search result document for a subsequently received search query that is associated with the search query.
13. A method comprising: receiving, at one or more processors, a same search query from a plurality of client devices; identifying, by the one or more processors, search result documents based on the search query; providing, by the one or more processors, information regarding the search result documents to the plurality of client devices; receiving, at the one or more processors, information regarding selections, of the information regarding the search result documents, at the plurality of client devices in connection with the search query; determining, by the one or more processors, that a particular quantity of the selections, for information regarding a particular search result document of the search result documents, is greater than a quantity of the selections for information regarding one or more other search result documents of the search result documents; assigning, by the one or more processors, a value to the particular search result document based on determining that the particular quantity of the selections, for the information regarding the particular search result document, is greater than the quantity of the selections for the information regarding the one or more other search result documents, the value, assigned to the particular search result document, being based on at least one of: a particular period of time, or a respective network address associated with one or more of the plurality of client devices; and using, by the one or more processors, the value as a measure of quality for the particular search result document for a subsequently received search query that is associated with the search query. 17. The method of claim 13 , where using the value as the measure of quality for the particular search result document includes: ranking the particular search result document higher than another search result document, in a subsequently performed document scoring or ranking algorithm, based on the assigned value being higher than a value assigned to the other search result document.