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Lecture 12

Lecture 12. Case Studies in Information Networks: Part 2. Today’s Plan. Club Nexus Related Work Implications for Design Final Papers. Findings…. Look Familiar?. Findings Cont’d…. Club Nexus shows evidence of: Clustering & Cliques Bridges – ‘weak ties’ ‘Betweenness’ Homophily

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Lecture 12

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  1. Lecture 12 Case Studies in Information Networks: Part 2

  2. Today’s Plan • Club Nexus • Related Work • Implications for Design • Final Papers

  3. Findings… Look Familiar?

  4. Findings Cont’d… • Club Nexus shows evidence of: • Clustering & Cliques • Bridges – ‘weak ties’ • ‘Betweenness’ • Homophily • Similarity Drops with Network Distance

  5. Uh, What? Figure 4: Average fraction of users with a common trait (year, undergraduate or graduate status, etc.) as a function of the distance from a user having that trait. The plot is truncated at eight hops because less than .03% of the pairs are separated by more than eight hops.

  6. Pros… • Surprise! Online = Offline! • Applied Theory in an Actual Social Network • Rarity • Oft-Cited • …

  7. …and Cons. • Messy, Self-Report Data • Questionable Methods Choices • Personality ‘Stereotypes’?! • Stanford?!

  8. Small World Effect • How do people use information to search in a network? Lada Adamic and Eytan Adar. “How to search a social network”. Social Networks Volume 27, Issue 3, July 2005, Pages 187-203

  9. Implications for Design • Some stable patterns of behavior are difficult to change. • What are the sound assumptions about network of a given structure? • Identifying influential users • What information is exposed to the network? • Social network analysis as a tool for users.

  10. Privacy • How do social networks influence privacy, perceptions of privacy? Stutzman, F. (2006, April). An evaluation of identity-sharing behavior in social network communities. Paper presented at the iDMAa and IMS Code Conference, Oxford, Ohio.

  11. Closing in on Paper Topics

  12. Nuts and Bolts • 25 – 35 Pages • 30% of your grade • Due May 15th

  13. Picking a Topic • Scope Narrowly! • Places to start: • Pick a topic from class you are interested in • Pick a particular case study of interest • Pick a particular group or community of interest

  14. Research Strategies Getting Started: • Find a paper you love, expand from there. • Find a paper you hate, expand from there. • Find two papers that disagree, explore the issues. • Find a paper you can apply to another domain.

  15. Next Week Diffusion of Innovations or Everything Malcolm Gladwell wanted you to think he figured out on his own.

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