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Sociapedia: Online Collaboration Over a Social Network Sociapedia: Online Collaboration Over a Social Network by Mihir Kedia Submitted to the Department of Electrical Engineering and Computer Science in partial fulfillment of the requirements for the degree of Master of Science IMSACHUSETTS INSTTE OF TECHNOLOGY at the SEP 3 0 2009 MASSACHUSETTS INSTITUTE OF TECHNOLOGY Z ' September 2009 © Massachusetts Institute of Technology 2009. All rights reserved. ARCHIVES Author *------------------------------ Department of Electrical Engineering and Computer Science August 7, 2009 Certified by .... David R. Karger Professor of Electrical Engineering and Computer Science Thesis Supervisor (_"2 Accepted by / Terry P. Orlando Chairman, Department Committee on Graduate Students Sociapedia: Online Collaboration Over a Social Network by Mihir Kedia Submitted to the Department of Electrical Engineering and Computer Science on August 7, 2009, in partial fulfillment of the requirements for the degree of Master of Science Abstract This paper introduces Sociapedia, a collaborative social network application that encourages friends to contribute content about each other. Sociapedia is designed upon the same principles that allowed ordinary web users to construct the comprehensive encyclopedia Wikipedia, and is built on top of the largest social network currently in existence. Several lessons from the evolution of Sociapedia are discussed. In order to learn how people would use a collaborative social network like Sociapedia, a field study was conducted over the period of one week. We established that Sociapedia generates accurate information that is not otherwise present, and characterize the nature and structure of this information. We also compare methods for spreading applications in Facebook. Finally, we analyze Sociapedia's growth and offer several suggestions for increasing its reach throughout Facebook. Thesis Supervisor: David R. Karger Title: Professor of Electrical Engineering and Computer Science Contents Introduction................. .................................................................................................................................. 7 Backgro und ..... ... .......... ...... ........................... ................ ...................... ....................... 9 W ikis ................................................ .......................................... ........ ......................... 9 Social Networks ................. ....................... ................................... 11 Facebook ....................... ....... .. .................................................... ............................ 11 Related W ork..................................... ........... ...... .... ... .. ................ ............ 17 Collabio ................. ................................................... 17 Facebook Applications .......................... .. ....... ................................................ 19 25 Random Things About You M em e..................................... ... ..... ........ .... ......................... 19 Design ..................................................... ...... ................ ... ............ .. ... ......................... 2 1 Interface .................................................................... ....... ... ........... ......................... 23 Early Design ...................... .............................................................................. ..................... 23 Cu rre nt Be havio r ........................................................ ............. ............................................. 24 Content Access Policy...................... ... .. .. .... ........................................ ......................... 24 Discussio n Page .......................................................................... ....... ........... .................. .... 25 Tagging Frie nd s................................. .. ....... ............ .. .......................................................... 2 5 Lin ks Bo x ......................................... .................... .. ........................................................... 2 5 Suggestions.............................. ............ .................................................. 26 New s Feed Po sts............................................ ................................................. ............................ 27 Notifications ................................................ .................................... ........ ........................ 27 Eng in e e ring ..................................... ....... ....................................................................................... 2 9 Background: Third-Party Applications in Facebook .................................... 29 Im p le m e ntatio n .......................... ...... ........... ..... .............................................................30 Integration............................ ............. .................................................. 30 Tips for Facebook Application Development ............................................................ 31 Fie ld Study ................................................. .............................. ... .... .......... ..................... 3 3 Statistics ..................... ........................................................................................................... 34 Article Content .......................... ................. ... ....................................... 34 Categorization Schem e ............................................................... 34 Co ntent Breakdow n ........................................ ....... ............. ................................................ 36 Uniqueness.............................. .... ......... ........ ........ ........ ..... ...... ...... ............................ 37 A ccu racy ........................................ .......... .................. .. ..... .. .. .. ..................................... 3 8 Stru ctu re ........................................ .. .. ... ..... ..... ......................... ........................................ 3 8 Discussio n Pages ........................................ .............. ...... ................................................... 39 Recruitment: How Does the Application Spread ....................................................... 39 Ed ito rs ...................................................... .................................... ...... ................ ........................ 4 1 S p re a d ............................................ ....................................................... ..... ... .............................. 4 1 M o tivatio ns ........................................ ......... ........ ...... ....... .... .. ....................................... 4 3 Behavio r................................ ..................................................................... .. .................. 44 Co nclusio ns.............................................. ......... .................................................................... 4 7 I li"""-l:-~i-~i'r;-F-;~---;---- . ..~ ..... ;...~....,......~...~~.,;...~.- Future W ork .............................................. ............................................. ............................................... 51 Bib lio g ra p hy ................................................................................................................................................ 5 5 Introduction The Sociapedia project was started in order to create a people encyclopedia: a repository of information about regular people. While we can easily go to the library and look up information about famous figures throughout history, it is much harder to find out more about the people we interact with every day. Online websites exist that are devoted to this goal. These websites are called social networks, and they create a platform over which hundreds of millions of people can create profiles and interact with each other. Users can create profiles on these sites to tell others more about themselves: their hobbies, favorite TV shows, and more. This is interesting information, but is not necessarily complete. We would like to find a way to collect information beyond that which users write about themselves. Our approach is to get this information from friends and colleagues of the user. We want to create a site where any of your friends can come and help write articles about you. There are already some existing projects that try to collect information about users through their friends, but we believe that our encyclopedic approach can collect additional information that these methods do not. _ ._ ---------- This approach is similar in style to the one that built the Wikipedia website, and our first step was to take a closer look at this enormous encyclopedia. Wikipedia is an encyclopedia that contains over three million comprehensive articles on a huge variety of topics (Johnson). What makes Wikipedia extraordinary, however, is its atypical authorship. While most encyclopedias are the result of painstaking years of labor by a select team of experts, Wikipedia has always allowed anyone to write content and edit articles. Wikipedia has 10 million registered contributors, and over 300 million individual contributions or edits have occurred since its creation in 2001 (Wikipedia). How can we harness the same forces that built Wikipedia to create our people encyclopedia? One thought would be to have
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