Studying Community Dynamics CS 294h – 9 FEB 2010.

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Presentation transcript:

Studying Community Dynamics CS 294h – 9 FEB 2010

USENET [Smith, Fiore]

Usenet Visualization (Viégas & Smith) Show correspondence patterns in text forums Initiate vs. reply; size and duration of discussion

Newsgroup crowds / Authorlines

History Flow Wikipedia History Flow [Viégas et al]

Group Lens GroupLens / MovieLens [Univ. Minnesota]

GWAP Games with a Purpose [von Ahn et al]

Many-Eyes / sense.us Many Eyes [IBM]

Mankoff Green FB StepGreen [Mankoff et al]

RESEARCH

existing system augment environment create new environment observe environment new system

self- experimentation observation participant-observation observer participant

new system observer existing system participant navel gazing eat your own dog food armchair philosophe r field of dreams meddling researchers

observer existing system participant new system

Research Approaches Studying characteristics of online communities  Collect usage data; Observe, interview users Intervene in existing systems  e.g., Facebook apps  Controlled experimentation Introduce + study new systems  Requires massive investment (?) Mining social media  Recommendation and matching algorithms, …

Research Questions How and why do people join communities? How is collective action organized? Why do people contribute? (Incentives) Issues of quality control, privacy, trust, … What are the interactions between social structure and system design? How do these findings generalize and inform the design of new socio-technical systems?

EXAMPLE: WORLD OF WARCRAFT

World of Warcraft World of Warcraft [Yee, Ducheneaut et al]

EXAMPLE: COORDINATION IN WIKIPEDIA

History Flow Wikipedia History Flow [Viégas et al]

“Emergent” Order and Coordination

“Talk” Pages on Wikipedia Viégas et al. 2007

Coordination on Wikipedia “… [we] note that administrative and coordinating elements seem to be growing at a faster pace than the bulk of articles in the encyclopedia [Wikipedia]” Viégas et al. 2007

Wiki Dashboard Wiki Dashboard [Suh et al]

EXAMPLE: COLLABORATIVE TAGGING

Collaborative Tagging & Rating

Forms of Tagging (Golder ‘05)  Identifying what (or who) it is about. (topics)  Identifying what it is. (“blog”, “book”, “video”)  Identifying who owns it.  Refining categories.  Identifying qualities or characteristics. (“funny”)  Self reference. (“mystuff”)  Task organizing. (“toread”)

Personal Tag Usage

Inferences from Tag Order?

Stability of Tag Use

[Chi & Mytkowicz]

[Budiu, Pirolli, & Hong]

EXAMPLE: SOCIAL NETWORK ANALYSIS

DEMO

Who is my best friend?

The Strength of Weak Ties “Interpersonal Ties” – Strong, Weak, or Absent Tie strength modeled as a combination of time, emotional intensity, intimacy, and services. Weak ties shown to:  Provide the majority of the network structure  Transmit novel information among groups [Granovetter 73, 83]

Eliciting Tie Strength [Gilbert ‘09]

Model Prediction

How might you apply these results?