5. The method of claim 1 , wherein the watch time function is given by: 
 S′=S×M Q,D i , wherein M Q,D i is a watch time multiplier computed from the one or more watch time signals for the query and the first resource.
5. The method of claim 1 , wherein the watch time function is given by: 
 S′=S×M Q,D i , wherein M Q,D i is a watch time multiplier computed from the one or more watch time signals for the query and the first resource. 6. The method of claim 5 , wherein the one or more watch time signals for the first resource include two or more watch time signals, and the watch time multiplier is based on a product of two or more of the watch time signals for the first resource.