13. The computer-implemented method of claim 12 , further comprising: identifying a second user attribute; identifying second user attribute indicated interactions with the given document by a third set of users associated with the second user attribute, the second user attribute indicated interactions including indicated interactions with the given document in response to more than one query; determining a second user attribute bias measure for the given document for the second user attribute, the determining the second user attribute bias measure based on comparison of the third user attribute indicated interactions and the additional indicated interactions; and associating the second user attribute bias measure for the second user attribute with the given document.
14. The computer-implemented method of claim 13 , wherein the third set of users includes one or more users not present in the set of users.