36. Lady in the
Water
Snakes on a
Plane
Just My
Luck
Superman
Returns
You, Me and
Dupree
The Night
Listener
Lisa Rose 2.5 3.5 3.0 3.5 2.5 3.0
Gene Seymour 3.0 3.5 1.5 5.0 3.5 3.0
Michael Phillips 2.5 3.0 - 3.5 - 4.0
Claudia Puig - 3.5 3.0 4.0 2.5 4.5
Mick LaSalle 3.0 4.0 2.0 3.0 2.0 3.0
Jack Matthews 3.0 4.0 - 5.0 3.5 3.0
Toby - 4.5 - 4.0 1.0 -
44. Creating recommendations for Toby
Lady in the
Water
Snakes on a
Plane
Just My
Luck
Superman
Returns
You, Me and
Dupree
The Night
Listener
Lisa Rose 2.5 3.5 3.0 3.5 2.5 3.0
Gene Seymour 3.0 3.5 1.5 5.0 3.5 3.0
Michael Phillips 2.5 3.0 - 3.5 - 4.0
Claudia Puig - 3.5 3.0 4.0 2.5 4.5
Mick LaSalle 3.0 4.0 2.0 3.0 2.0 3.0
Jack Matthews 3.0 4.0 - 5.0 3.5 3.0
Toby - 4.5 - 4.0 1.0 -
56. Massa, P., & Avesani, P. (2007, October). Trust-aware recommender systems. In Proceedings of
the 2007 ACM conference on Recommender systems (pp. 17-24). ACM.
“However due to data sparsity of the input
ratings matrix, the step of finding similar
users often fails.” (Massa & Avesani, 2007)
+
trust metrics
“PageRank, for example, is a global trust
metric.” (Massa & Avesani, 2007)
57.
58. - Top50
Reviews - 374
- 82,711/2,751,778
Reviews
Reviews
Reviews
user DNA
59. how much should the “source” trust the “sink”?
Trust-aware recommendation
71. Different users may have common
resources
Different resources may have
common tags
Users may have similar tags on
their common resources
Community
Relationship
Consensus
72. What tag can bring to users?
• For observing and modeling users
• Users’ mood and opinion on objects
• Labeling resources by consensus of users