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The Wisdom of the Few @SIGIR09

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Xavier Amatriain
Xavier Amatriain

Presenting The Wisdom of the Few, a Collaborative Filtering approach based on Expert opinions from the Web. This presentation was done in SIGIR 2009 (July 09, Boston, MA)

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The Wisdom of the Few ,[object Object],[object Object],[object Object],[object Object],[object Object]
First, a little quiz ,[object Object],“ It is really only experts who can reliably account for their reactions”
Crowds are not always wise ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Overview of the Approach ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Advantages of the Approach ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Take home message ,[object Object],[object Object],[object Object],[object Object]
User study
User Study ,[object Object],[object Object],[object Object]
User Study ,[object Object],[object Object]
Expert Collaborative Filtering
Expert-based CF ,[object Object],[object Object],[object Object],[object Object],[object Object]
Experts vs. Users Analysis
Mining the Web for Expert Ratings ,[object Object],[object Object]
Dataset Analysis (# ratings) ,[object Object],[object Object],[object Object]
Dataset Analysis ( average) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Dataset Analysis (std) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Dataset Analysis. Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Experimental Results
Evaluation Procedure ,[object Object],[object Object],[object Object],[object Object]
Results. Prediction MAE ,[object Object],[object Object],[object Object]
Role of Thresholds ,[object Object],[object Object],[object Object],[object Object],[object Object]
Comparison to standard CF ,[object Object],[object Object]
Results2. Top-N Precision ,[object Object],[object Object]
Conclusions ,[object Object],[object Object],[object Object]
Future/Curent Work ,[object Object]
The Wisdom of the Few ,[object Object],[object Object]

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