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Etakeawayscan aggregate content fragmentedacross platformsimprove recall, not rely on site-specificfeatures
overview E Multi-site content (WSDM 2012) Vox Civitas Multiplayer
research questionscan Twitter content around broadcastnews events inform journalistic inquiry?what insights and analyses can weenable through visual analytic tools?[with postdoctoral fellow Nick Diakopoulos]
how to evaluate?directly evaluate the output of thealgorithms (quantitative)deep, extensive evaluation of users’interaction with the system (qualitative) read more: Olsen (UIST ’07) Naaman (MTAP ’12)
Vox evaluation goals• How effective for generating story ideas?• What kind of insights/analysis are supported?• Shortcomings and how features are used?
takeawayscan extract reliable event structure fromsocial media
overview E Multi-site content Vox Civitas (VAST 2010) Multiplayer
what the hell?[with: Lyndon Kennedy, Dan Ellis, Kai Su]
supporting analysisextract the signal from people’sattention:find overlapping momentscompute and rank scenesextract scene descriptors