Ed Chi

research wikipedia hci asc social twitter cognition keynote parc mturk social media search web2.0 crowd dynamics editorship wisdom wikisym design web20 edchi recommender amazon conference chi2009 mrtaggy wikidashboard 2011 social computing tagging web evaluation lab augmented dynamic shifts wisdomofcrowd infoforaging social community overview editor activity population analysis growth model evolution tagsearch social tagging conflict chi2007 tag-based relevance feedback forum position living paper method methodology ecological laboratories models 2009 changes user study tutorial replication social sciences duplication cscl education2.0 elearning social annotation usage languages social stream mechanical turk aaai human computer interaction sss invited talk location language behavior analytics korea 2012 ml platform machine learning deep retrieval focused learning workshop infoscent user modeling foraging acm talk modeling msm10 msm2010 hypertext hcir ebook iui index highlighting passages chi2010 model-based delicious large scale data analytics social analytics topic client browsing browser clustering