?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Feprints.imtlucca.it%2F2788%2F&rft.title=Debunking+in+a+World+of+Tribes&rft.creator=Zollo%2C+Fabiana&rft.creator=Bessi%2C+Alessandro&rft.creator=Del+Vicario%2C+Michela&rft.creator=Scala%2C+Antonio&rft.creator=Caldarelli%2C+Guido&rft.creator=Shekhtman%2C+Louis&rft.creator=Havlin%2C+Shlomo&rft.creator=Quattrociocchi%2C+Walter&rft.subject=HM+Sociology&rft.subject=QA75+Electronic+computers.+Computer+science&rft.description=Recently+a+simple+military+exercise+on+the+Internet+was+perceived+as+the+beginning+of+a+new+civil+war+in+the+US.+Social+media+aggregate+people+around+common+interests+eliciting+a+collective+framing+of+narratives+and+worldviews.+However%2C+the+wide+availability+of+user-provided+content+and+the+direct+path+between+producers+and+consumers+of+information+often+foster+confusion+about+causations%2C+encouraging+mistrust%2C+rumors%2C+and+even+conspiracy+thinking.+In+order+to+contrast+such+a+trend+attempts+to+%5Ctextit%7Bdebunk%7D+are+often+undertaken.+Here%2C+we+examine+the+effectiveness+of+debunking+through+a+quantitative+analysis+of+54+million+users+over+a+time+span+of+five+years+(Jan+2010%2C+Dec+2014).+In+particular%2C+we+compare+how+users+interact+with+proven+(scientific)+and+unsubstantiated+(conspiracy-like)+information+on+Facebook+in+the+US.+Our+findings+confirm+the+existence+of+echo+chambers+where+users+interact+primarily+with+either+conspiracy-like+or+scientific+pages.+Both+groups+interact+similarly+with+the+information+within+their+echo+chamber.+We+examine+47%2C780+debunking+posts+and+find+that+attempts+at+debunking+are+largely+ineffective.+For+one%2C+only+a+small+fraction+of+usual+consumers+of+unsubstantiated+information+interact+with+the+posts.+Furthermore%2C+we+show+that+those+few+are+often+the+most+committed+conspiracy+users+and+rather+than+internalizing+debunking+information%2C+they+often+react+to+it+negatively.+Indeed%2C+after+interacting+with+debunking+posts%2C+users+retain%2C+or+even+increase%2C+their+engagement+within+the+conspiracy+echo+chamber.&rft.publisher=ArXiv&rft.date=2015-10&rft.type=Working+Paper&rft.type=NonPeerReviewed&rft.identifier=++Zollo%2C+Fabiana+and+Bessi%2C+Alessandro+and+Del+Vicario%2C+Michela+and+Scala%2C+Antonio+and+Caldarelli%2C+Guido+and+Shekhtman%2C+Louis+and+Havlin%2C+Shlomo+and+Quattrociocchi%2C+Walter++Debunking+in+a+World+of+Tribes.++Working+Paper+++ArXiv+++++++(Submitted)+++&rft.relation=http%3A%2F%2Farxiv.org%2Fabs%2F1510.04267