-tap to begin recording your question and again to stop. side, User ? Database - Local Client Remote Services and Worker Interface 4UFQϢʔβ͕࣭Λߘ 4UFQγεςϜ෦ͷਓ͕ؒճ ίʔϯͷ؈ͲΕʁ Ұ൪ӈͷ؈Ͱ͢ 3 J. Bigham et al.: VizWiz: Nearly real-time answers to visual questions, In UIST, 2010.
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NO YES NO YES YES YES YES NO ? ? ? ਖ਼ղ ਖ਼ղ 14 A. P. Dawid and A. M. Skene: Maximum likelihood estimation of observer error-rates using the EM algorithm, Journal of the Royal Statistical Society. Series C (Applied Statistics), 1979.
Figure 2. Crowdproof is a human-augmented proofreader. Find Fix Verify 16 J. Bigham et al.: Soylent: A word processor with a crowd inside, In UIST, 2010.
articles platform for viral collaboration that used recursive incentives to align the public’s interest with the goal of win- ning the Challenge. This approach was inspired by the work of Peter S. Dodds et al.5 that found that success in us- ing social networks to tackle widely distributed search problems depends on individual incentives. The work of Mason and Watts7 also informed the use of financial incentives to motivate crowdsourcing productivity. The MIT team’s winning strategy was to use the prize money as a finan- cial incentive structure rewarding not only the people who correctly located balloons but also those connecting the finder to the MIT team. Should the team win, they would allocate $4,000 in prize money to each balloon. They Figure 1. Locations in the DARPA Red Balloon Challenge. Figure 2. Example recursive incentive-structure process for the MIT team. 18 J. Tang et al.: Reflecting on the DARPA red balloon challenge, Communications of the ACM, 2011.