lecture 12 case studies in information networks: part 2
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LECTURE 12Case Studies in Information Networks:Part 2
Today’s Plan
1. Club Nexus2. Related Work3. Implications for Design4. Final Papers
Findings…
Look Familiar?
Findings Cont’d…
Club Nexus shows evidence of: Clustering & Cliques Bridges – ‘weak ties’
‘Betweenness’ Homophily Similarity Drops with Network
Distance
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.
Pros…
Surprise! Online = Offline! Applied Theory in an Actual Social
Network Rarity Oft-Cited …
…and Cons.
Messy, Self-Report Data Questionable Methods
Choices Personality ‘Stereotypes’?! Stanford?!
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
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.
Privacy
How do social networks influence privacy, perceptions of privacy?
Stutzman, F. (2006, April). An evaluation of identity-sharing behavior in social networkcommunities. Paper presented at the iDMAa and IMS Code Conference, Oxford, Ohio.
Closing in on Paper Topics
Nuts and Bolts
25 – 35 Pages 30% of your grade Due May 15th
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
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.
Next Week
Diffusion of Innovations
or
Everything Malcolm Gladwell wanted you to think he figured
out on his own.
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