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COURSERANK: A Closed-Community Social Site through the Magnifying Glass

COURSERANK: A Closed-Community Social Site through the Magnifying Glass

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COURSERANK: A Closed-Community Social Site through the Magnifying Glass

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Presentation Transcript

  1. COURSERANK: A Closed-Community Social Site through the Magnifying Glass

  2. Open - simple interactions - simple tasks uploading, reviewing, poking, socializing … This talk: A Closed-Community, Special-Purpose Social Site Introduction Social sites on the Web thrive

  3. How does CourseRank differ from other sites? Why is CourseRank popular? Two things Facebook does not have Introduction Some highlights

  4. Overview Special Features Service Evolution Phenomena and patterns Lessons Learned Outline of the Talk

  5. CourseRank is … An educational and social site for Stanford students to: Evaluate courses Browse courses, instructors, books Plan their academic program Interact with each other Ask and answer questions

  6. Course statistics Reviews, ratings Overview Course Information

  7. Overview Course planner

  8. Overview Course Requirements

  9. Overview Explore courses

  10. Overview Explore courses

  11. CourseRank in numbers 1.5 year 11,334 students 18,951 courses 85,488 ratings 2,744 text reviews

  12. Overview Special Features Service Evolution Phenomena and patterns Lessons Learned Outline of the Talk

  13. Well-defined closed community 1 Multiple constituencies 2 Special-purpose tools 3 Hybrid data 4 CourseRank

  14. Well-defined closed community 1 Examples Multiple constituencies 2 University social site Scientific social site Corporate social site Special-purpose tools e.g., A-Space 3 Hybrid data 4 A new class of social sites Special-purpose social sites

  15. Overview Special Features Service Evolution Phenomena and patterns Lessons Learned Outline of the Talk

  16. %9,39 of Internet Users use FaceBook Popularity >85% of Stanford students are CourseRank users FaceBook Users1: 150,557,534 Internet Users2 : 1,596,270,108 1: http://blog.facebook.com/blog.php?post=46881667130 2: http://www.internetworldstats.com/stats.htm

  17. e.g.,Yahoo Answers Usage Usage follows the academic cycle Less predictable peaks

  18. Overview Special Features Service Evolution Phenomena and patterns Lessons Learned Outline of the Talk

  19. 30% 31% 38% Participation inequality Social sites 20% created by intermittent, 80% by active 31% lurkers, 38% intermittent, 30% active http://www.90-9-1.com/ More users contribute

  20. Community Effect Community Size matters

  21. Philosophy Physics Sociology User Profiles Computer Science The social phenomenon is bigger than us

  22. In CourseRank Collecting official data unofficially Truths and Lies In social sites I am tall and handsome Good incentives make better users

  23. Our misconceptions Students give unbiased well-informed ratings No one is perfect  …

  24. Overview Special Features Service Evolution Phenomena and patterns Lessons Learned Outline of the Talk

  25. Lessons Learned Added-value services High-quality data Community feeling Meaningful incentives

  26. Thank you Questions?