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Sharing Location over Social Media Guanling Chen University of Massachusetts Lowell http://www.cs.uml.edu/~glchen [email protected]
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MSM 2011 keynote

Dec 25, 2014

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Keynote presentation from Prof. Guanling Chen, University of Massachusetts Lowell for MSM 2011 workshop
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Page 1: MSM 2011 keynote

Sharing Location over Social Media

Guanling Chen University of Massachusetts Lowell

http://www.cs.uml.edu/~glchen [email protected]

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Dodgeball

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Brightkite, Gowalla

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Loopt, Google Latitude

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Foursquare

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Facebook Places

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Check-In

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Foursquare Check-Ins

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Why Check-In?

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Brightkite Study

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Data

– About two years Updates 4,460,161 – Daily Friends List 168 days – Users Profile 70,337

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Characteristics

Analysis of a Location-Based Social Network Nan Li and Guanling Chen International Symposium on Social Intelligence and Networking (SIN) Vancouver, Canada, August 2009.

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Tag Cloud

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Classification

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Proportion of Protected Updates (PoPU)

Sharing Location in Online Social Networks Nan Li and Guanling Chen IEEE Networks Special Issue on Online Social Networks, 24:5, pages 20-25, September-October 2010.

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Gender

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Age

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# visited places

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Friends

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Influence

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Privacy Design

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Control & Feedback

Design for Privacy in Ubiquitous Computing Environments. Victoria Bellotti and Abigail Sellen. ECSCW 1993.

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Capture

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Construction

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Accessibility

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Purposes

Analyzing Privacy Designs of Mobile Social Networking Applications Guanling Chen and Faruq Rahman IEEE/IFIP International Symposium on Trust, Security and Privacy for Pervasive Applications (TSP). Shanghai, China, December, 2008.

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UI Usability

A Toolkit for Usability Testing of Mobile Applications Xiaoxiao Ma, Bo Yan, Guanling Chen, Chunhui Zhang, Ke Huang, and Jill Drury The 3rd International Conference on Mobile Computing, Applications, and Services (MobiCase) Los Angeles, CA, October 2011.

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Public location disclosure control

Business location disclosure control Cross boundary

sharing control

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User can control whether to share this Check-in with friends inline

User can control whether to share this Check-in to Facebook or Twitter inline

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Policy

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Mobile Usability Testing

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Android UI Framework

Dialog

Button Widget (View Class)

AdapterView (ViewGroup)

Menu

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Recorded Events

Recorded  Android  UI  Events  are  summarized  in  the  following  table,  classified  by  their  adhering  window  

Unhandled Area

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State Machine Model

Expert  State  Machine:  

Expert  States  and  Transi3ons:  

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Traffic Flow Chart User  Traffic  Flow  Chart:  

Mistake  States  and  Transi3ons:  

Incoming  flow  

Outgoing  flow  

Flow  to  Mistake  States  

Backtracking  flow  

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Reported Metrics

Signs  for  poten3al  usability  problems:  

-­‐ Too  many  backtracking  

-­‐ Par0cipants  cannot  complete  one  step  

-­‐ Low  correct  flow  ra0o  43

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Evaluation Usability  Problems  idenFfied  by  Event  Logging  Tool:  

*  Numbers  in  parenthesis  are  problems  idenFfied  by  Laboratory-­‐based  Usability  tesFng  method:  

-­‐  Good  at  iden3fying  cri3cal  (major  and  catastrophe)  usability  problems.  

-­‐  Not  good  at  iden3fying  cosme3c  usability  problems.  

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Q&A

http://www.cs.uml.edu/~glchen/

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