23. A method as recited in claim 21 , wherein the force on the touch-sensitive display comprises the greater force, and the refining of the search results comprises narrowing the search results displayed on the touch-sensitive display.
21. A method comprising: under control of one or more computing systems configured with specific executable instructions, detecting an initial selection of a portion of a content item being output by a touch-sensitive display and measuring a force of the initial selection on the touch-sensitive display; causing display of search results associated with the selected portion of the content item on the touch-sensitive display at least partly in response to the detecting of the initial selection; detecting a force on the touch-sensitive display that is greater or lesser than the measured force of the initial selection; and refining the search results displayed on the touch-sensitive display at least partly in response to the detecting of the greater or lesser force, the refining the search results including generating a refined query based at least in part on a query that returned the search results.