1. A computer-implemented method for modifying a user's search experience, the method comprising: assigning a first set of symbols that represent a first set of actions initiated by the user during creation of a first search trail; assigning a second set of symbols that represent a second set of actions initiated by the user during creation of a second search trail; determining a measure of interaction variance classification that represents an extent to which there are differences between that first and second sets of symbols, wherein determining the measure of interaction variance comprises determining the measure based at least in part on hyperlink navigations initiated by the user and indicated by the first and second sets of symbols; assigning a search behavior classification to the user based at least in part on the measure of interaction variance; and customizing, based at least in part on the assigned search behavior classification, the user's experience with a search process.