This document summarizes a dissertation that studied how Web 2.0 technologies can support or inhibit participatory culture. The study involved designing a Web 2.0 system called PocketKnowledge and analyzing user interactions over two years. Initial findings showed the system design discouraged participation, but after redesigning to give users more control, a radical interaction network formed with novices acting as facilitators. However, over time the network became more expert-oriented and consumptive. The dissertation concludes technologies both enable and constrain participatory culture depending on social and cultural contexts.

20. Volume of Material Sept. 2006- Sept. 2008

21. PK Creation of User Accounts Aug 2006- Aug 2008

22. Community Program Collections (CPC)

23. Highlighting design differences: CPC and Copyright

24. Highlighting design differences: PocketKnowledge and Copyright

25. CPC Suggested Additions

27. Key Knowledge Facilitators

28. Key Knowledge Facilitators, September 2006 through November 2006 Library Doctoral Student MA Student Faculty/ Instructor Staff Other Key Actors 2 4 9 2 3 0 % of all Key Actors 11.1% 22.2% 50.0% 11.1% 5.6% 0% % of all users .9% 28.9% 46.5% 7.5% 4.8% 11.9%

29. September 2006 to January 2007

30. Key Knowledge Facilitators, September 2006 through January 2007 Library Doctoral Student MA Student Faculty/instructor Staff Other Cutpoints 5 37 35 22 7 9 % of all cutpoints 4.3% 32.2% 30.4% 19.1% 6.1% 7.8% % of all users .3% 22.2% 35.5% 4.0% 1.9% 36.2%

33. Latent Semantic Analysis Results Cluster / User Types Focused Divergent All users 209 (61%) 39% Key Knowledge Facilitators 61 (59%) 42 (41%)

39. Thank you. Anthony Cocciolo cocciolo@tc.columbia.edu www.thinkingprojects.org