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System and method for utilizing social networks for collaborative filtering

  • US 7,689,452 B2
  • Filed: 05/17/2004
  • Issued: 03/30/2010
  • Est. Priority Date: 05/17/2004
  • Status: Expired due to Fees
First Claim
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1. A computer-implemented method of predicting an active user'"'"'s rating for an item in a recommendation system implemented on computing equipment, wherein the active user and a plurality of non-active users are members of a social network implemented on computing equipment, comprising:

  • providing a similarity measure, w″

    a,u for each pair of users in said recommendation system;

    determining ratings for items rated by non-active users in said recommendation system;

    calculating, with the similarity measure w″

    a,u, by the processor, a weighted average of ratings for said item to produce the predicted active user'"'"'s rating;

    wherein the similarity measure, w″

    a,u comprises a relationship distance in said social network between pairs of users,wherein an initial version of the similarity measure wa,u for active user a and non-active user u in the system comprises the relationship

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