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Information Systems and Computer Media - Graz University of Technology!
Predicting Interactions in !
Online Social Networks!
!
An Experiment in Second Life!
Michael Steurer and Christoph Trattner!
Graz University of Technology!
Austria!
Information Systems and Computer Media - Graz University of Technology!
Predicting Interactions In Online Social Networks!
Motivation!
!   Predicting Communication!
!   Interactions between users !
!   Reciprocity of interactions!
!   No Research for Combined Dataset!
!
!   Used Datasets!
!   Online Social Network!
!   Location-based Social Network!
Information Systems and Computer Media - Graz University of Technology!
Predicting Interactions In Online Social Networks!
Second Life!
http://notizen.typepad.com/aus_der_provinz/sl061018_001_1.jpg!
Information Systems and Computer Media - Graz University of Technology!
Predicting Interactions In Online Social Networks!
Event Data!
Information Systems and Computer Media - Graz University of Technology!
Predicting Interactions In Online Social Networks!
Position Data!
http://notizen.typepad.com/aus_der_provinz/sl061018_001_1.jpg!
Information Systems and Computer Media - Graz University of Technology!
Predicting Interactions In Online Social Networks!
Online Social Data!
Information Systems and Computer Media - Graz University of Technology!
Predicting Interactions In Online Social Networks!
Collecting Data!
!   Event Data!
!   10 months starting in March 2012!
!   218,245 unique events !
!   Location-based Social Data!
!   13 Million data samples!
!   190,160 unique users !
!   Online Social Data!
!   135,181 users with interactions on their “Wall” !
Information Systems and Computer Media - Graz University of Technology!
Predicting Interactions In Online Social Networks!
Networks!
!   Created Networks!
!   Online Social Network!
!   Location-based Social Network!
!   Topological Features!
!   Common Neighbors, Adamic Adar, …!
! Homophilic Features!
!   Groups, Regions, Distance, …!
Information Systems and Computer Media - Graz University of Technology!
Predicting Interactions In Online Social Networks!
Experimental Setup!
!   Merged Networks + Features!
!   Binary Classification Problem!
!
!   Predict Interactions!
!   Co-Occurrence!
!   Interaction – No Interaction!
!   Predict Reciprocity!
!   Co-Occurrence!
!   Reciprocal – Not Reciprocal!
Information Systems and Computer Media - Graz University of Technology!
Predicting Interactions In Online Social Networks!
Feature Differences!
!   Predict Interactions!
!   Significant differences!
!   Common Groups – 1.9 vs. 0.4!
!   Distance – 10.3m vs. 38.1m!
!   Predict Reciprocity!
!   Topological features significantly different!
!   Common Groups – 2.0 vs. 1.81!
!   Distance – 9.35m vs. 11.19m!
Information Systems and Computer Media - Graz University of Technology!
Predicting Interactions In Online Social Networks!
!
!   Verified Stability – SVM, Random Forest!
Prediction Model!LogisticRegression!
Feature Set! Interactions! Reciprocity!
Online Social Network! 0.863 AUC! 0.679 AUC!
Location-based Social Network! 0.919 AUC! 0.551 AUC!
All Features! 0.953 AUC! 0.709 AUC!
Information Systems and Computer Media - Graz University of Technology!
Predicting Interactions In Online Social Networks!
Conclusion!
!   Predicting Interactions or Reciprocity!
!   Location-based social network features!
!   Online social network features!
!   Best Features!
!   Average distance between users, days seen!
!   Common Neighbors!
!   Future Work!
!   Predicting Partnership!
!   Use Time Information!
Information Systems and Computer Media - Graz University of Technology!
Predicting Interactions in !
Online Social Networks!
!
An Experiment in Second Life!
Michael Steurer and Christoph Trattner!
Graz University of Technology!
Austria!

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Predicting Interactions In Online Social Networks: An Experiment in Second Life; MSM Workshop; Hypertext 2013, Paris

  • 1. Information Systems and Computer Media - Graz University of Technology! Predicting Interactions in ! Online Social Networks! ! An Experiment in Second Life! Michael Steurer and Christoph Trattner! Graz University of Technology! Austria!
  • 2. Information Systems and Computer Media - Graz University of Technology! Predicting Interactions In Online Social Networks! Motivation! !   Predicting Communication! !   Interactions between users ! !   Reciprocity of interactions! !   No Research for Combined Dataset! ! !   Used Datasets! !   Online Social Network! !   Location-based Social Network!
  • 3. Information Systems and Computer Media - Graz University of Technology! Predicting Interactions In Online Social Networks! Second Life! http://notizen.typepad.com/aus_der_provinz/sl061018_001_1.jpg!
  • 4. Information Systems and Computer Media - Graz University of Technology! Predicting Interactions In Online Social Networks! Event Data!
  • 5. Information Systems and Computer Media - Graz University of Technology! Predicting Interactions In Online Social Networks! Position Data! http://notizen.typepad.com/aus_der_provinz/sl061018_001_1.jpg!
  • 6. Information Systems and Computer Media - Graz University of Technology! Predicting Interactions In Online Social Networks! Online Social Data!
  • 7. Information Systems and Computer Media - Graz University of Technology! Predicting Interactions In Online Social Networks! Collecting Data! !   Event Data! !   10 months starting in March 2012! !   218,245 unique events ! !   Location-based Social Data! !   13 Million data samples! !   190,160 unique users ! !   Online Social Data! !   135,181 users with interactions on their “Wall” !
  • 8. Information Systems and Computer Media - Graz University of Technology! Predicting Interactions In Online Social Networks! Networks! !   Created Networks! !   Online Social Network! !   Location-based Social Network! !   Topological Features! !   Common Neighbors, Adamic Adar, …! ! Homophilic Features! !   Groups, Regions, Distance, …!
  • 9. Information Systems and Computer Media - Graz University of Technology! Predicting Interactions In Online Social Networks! Experimental Setup! !   Merged Networks + Features! !   Binary Classification Problem! ! !   Predict Interactions! !   Co-Occurrence! !   Interaction – No Interaction! !   Predict Reciprocity! !   Co-Occurrence! !   Reciprocal – Not Reciprocal!
  • 10. Information Systems and Computer Media - Graz University of Technology! Predicting Interactions In Online Social Networks! Feature Differences! !   Predict Interactions! !   Significant differences! !   Common Groups – 1.9 vs. 0.4! !   Distance – 10.3m vs. 38.1m! !   Predict Reciprocity! !   Topological features significantly different! !   Common Groups – 2.0 vs. 1.81! !   Distance – 9.35m vs. 11.19m!
  • 11. Information Systems and Computer Media - Graz University of Technology! Predicting Interactions In Online Social Networks! ! !   Verified Stability – SVM, Random Forest! Prediction Model!LogisticRegression! Feature Set! Interactions! Reciprocity! Online Social Network! 0.863 AUC! 0.679 AUC! Location-based Social Network! 0.919 AUC! 0.551 AUC! All Features! 0.953 AUC! 0.709 AUC!
  • 12. Information Systems and Computer Media - Graz University of Technology! Predicting Interactions In Online Social Networks! Conclusion! !   Predicting Interactions or Reciprocity! !   Location-based social network features! !   Online social network features! !   Best Features! !   Average distance between users, days seen! !   Common Neighbors! !   Future Work! !   Predicting Partnership! !   Use Time Information!
  • 13. Information Systems and Computer Media - Graz University of Technology! Predicting Interactions in ! Online Social Networks! ! An Experiment in Second Life! Michael Steurer and Christoph Trattner! Graz University of Technology! Austria!