Project page zero, Smart Search, Learning to Personalize suggestions
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Suggestions, Search, Learning to Rank
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Project page zero, Smart Search, Learning to Personalize suggestions
- 2. Search transformed the way we look at the world
- 4. Search box: Looking at the world through a window
- 9. Satori: Entering the World of Entities
- 14. Sites
- 17. Bing uses the world of entities as soon as you type. Not only for refining search results
- 18. Smart Search Windows 8.1 World Wide
- 32. Learning to Personalize Query AutoCompletion Milad Shokouhi Microsoft
- 33. Relevance Labelling for Contextual Search • For learning we need labels. • Relevance labelling for contextual (personalized) search (auto-completion) is not trivial. • Previous work on personalized search [Fox et al., 2005] • Samples search impressions from the logs • Documents with SAT clicks are annotated with relevant labels • The goal is to learn a re-ranking model that improves the ranking of those relevant documents given the context.
- 35. Experimental Settings • Ranker: Lambda-Mart [Burges et al., 2011] • AOL testbed • 657K users (Mar-May 2006) • 128,620 queries in the prefix-tree • Userid, query, timestamp • Bing testbed • 196K logged in users with Microsoft LiveID (Jan-2013) • 699,862 queries in the prefix-tree • Userid, query, timestamp, age, gender, zip code • Training & testing on different sets of users
- 36. Personalized Ranking Features • Demographics • Age (5 groups) • Gender (2 groups) • Zip-code (10 groups) • Search history • Short (session) • Long (all past queries)
- 37. Personalization by Age The effectiveness of auto-completion personalization according to the user’s age in terms of MRR. All differences are statistically significant (P < 0.01) Testbed Baseline Personalized MRR (Gain/Loss) Bing (age) - - +3.80% Frequently promoted suggestions for different age groups Below 20 21-30 31-40 41-50 Above 50
- 38. Results Summary Features Short history Long history Age Gender Location All AOL +1.95% +4.45% +6.45% Bing 0.91% 5.57% 3.80% +3.59% +4.58% +9.42%