Titlebook: Collaboration and Technology; 19th International C Pedro Antunes,Marco Aurélio Gerosa,Gert-Jan Vreede Conference proceedings 2013 Springer-

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Data Quality in an Output-Agreement Game: A Comparison between Game-Generated Tags and Professional For the hierarchical thesaurus relations it was found that tags typically describe images at a less specific level than descriptors..Furthermore game-generated tags tend to describe ‘a(chǎn)rtifacts/objects’ and thus typically represent what is in the picture, rather than what it is about. Descriptors als

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