Statistical Collaborative Filters Users annotate items with numeric ratings. Users who rate items "similarly" become mutual advisors Users U1 U2 Recommendation computed by taking a weighted aggregate of advisor ratings6 Statistical Collaborative Filters ◼ Users annotate items with numeric ratings. ◼ Users who rate items “similarly” become mutual advisors. ◼ Recommendation computed by taking a weighted aggregate of advisor ratings. I1 I2 … Im U1 U2 . . Un U1 . . . . . . U1 . . . . . . U2 . . . . U2 . . . . . . . . … . . . . . . . . . . . . . . Un . . . . . . Un . . . . . . Items Users Users Users