Fighting search engine amnesia
Milad Shokouhi, Ryen W. White, Paul Nathan Bennett, Filip Radlinski · 2013
Web search engines frequently show the same documents repeatedly for different queries within the same search session, in essence forgetting when the same documents were already shown to users. Depending on previous user interaction with the repeated results, and the details of the session, we show that sometimes the repeated results should be promoted, while some other times they should be demoted.