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We thus introduce\n            <jats:italic>friendsourcing,<\/jats:italic>\n            a form of crowdsourcing aimed at collecting accurate information available only to a small, socially-connected group of individuals. Our approach to friendsourcing is to design socially enjoyable interactions that produce the desired information as a side effect.\n          <\/jats:p>\n          <jats:p>We focus our analysis around Collabio, a novel social tagging game that we developed to encourage friends to tag one another within an online social network. Collabio encourages friends, family, and colleagues to generate useful information about each other. We describe the design space of incentives in social tagging games and evaluate our choices by a combination of usage log analysis and survey data. Data acquired via Collabio is typically accurate and augments tags that could have been found on Facebook or the Web. To complete the arc from data collection to application, we produce a trio of prototype applications to demonstrate how Collabio tags could be utilized: an aggregate tag cloud visualization, a personalized RSS feed, and a question and answer system. The social data powering these applications enables them to address needs previously difficult to support, such as question answering for topics comprehensible only to a few of a user's friends.<\/jats:p>","DOI":"10.1145\/1746259.1746260","type":"journal-article","created":{"date-parts":[[2010,5,25]],"date-time":"2010-05-25T13:08:17Z","timestamp":1274792897000},"page":"1-28","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":44,"title":["Personalization via friendsourcing"],"prefix":"10.1145","volume":"17","author":[{"given":"Michael S.","family":"Bernstein","sequence":"first","affiliation":[{"name":"Massachusetts Institute of Technology, Cambridge, MA"}]},{"given":"Desney","family":"Tan","sequence":"additional","affiliation":[{"name":"Microsoft Research, Redmond, WA"}]},{"given":"Greg","family":"Smith","sequence":"additional","affiliation":[{"name":"Microsoft Research, Redmond, WA"}]},{"given":"Mary","family":"Czerwinski","sequence":"additional","affiliation":[{"name":"Microsoft Research, Redmond, WA"}]},{"given":"Eric","family":"Horvitz","sequence":"additional","affiliation":[{"name":"Microsoft Research, Redmond, WA"}]}],"member":"320","published-online":{"date-parts":[[2008,5,21]]},"reference":[{"key":"e_1_2_1_1_1","doi-asserted-by":"publisher","DOI":"10.1145\/91474.91485"},{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1145\/1031607.1031642"},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1145\/1753326.1753470"},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.1145\/1622176.1622195"},{"key":"e_1_2_1_5_1","doi-asserted-by":"publisher","DOI":"10.1145\/325737.325768"},{"key":"e_1_2_1_6_1","doi-asserted-by":"crossref","unstructured":"Brusilovsky P. 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The Structure of Collaborative Tagging Systems. http:\/\/arxiv.org\/pdf\/cs.DL\/0508082.  Golder S. and Huberman B. 2005. The Structure of Collaborative Tagging Systems. http:\/\/arxiv.org\/pdf\/cs.DL\/0508082."},{"key":"e_1_2_1_16_1","volume-title":"Proceedings of the International Conference on Weblogs and Social Media (ICWSM'07)","author":"Gosling S.","unstructured":"Gosling , S. , Gaddis , S. , and Vazire , S . 2007. Personality impressions based on Facebook profiles . In Proceedings of the International Conference on Weblogs and Social Media (ICWSM'07) , AAAI Press. Gosling, S., Gaddis, S., and Vazire, S. 2007. Personality impressions based on Facebook profiles. In Proceedings of the International Conference on Weblogs and Social Media (ICWSM'07), AAAI Press."},{"key":"e_1_2_1_17_1","doi-asserted-by":"publisher","DOI":"10.2307\/2092623"},{"key":"e_1_2_1_18_1","doi-asserted-by":"publisher","DOI":"10.1086\/225469"},{"key":"e_1_2_1_19_1","doi-asserted-by":"publisher","DOI":"10.1086\/226707"},{"key":"e_1_2_1_20_1","doi-asserted-by":"publisher","DOI":"10.1023\/A:1021271517844"},{"key":"e_1_2_1_21_1","doi-asserted-by":"crossref","unstructured":"Harper F. M. Xin Li S. Chen Y. and Konstan J. A. 2007. Social comparisons to motivate contributions to an online community. In Persuasive Technology. Springer 148--159.   Harper F. M. Xin Li S. Chen Y. and Konstan J. A. 2007. Social comparisons to motivate contributions to an online community. In Persuasive Technology. 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