?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Feprints.imtlucca.it%2F2124%2F&rft.title=Influence+of+media+on+collective+debates&rft.creator=Quattrociocchi%2C+Walter&rft.creator=Caldarelli%2C+Guido&rft.creator=Scala%2C+Antonio&rft.subject=QA75+Electronic+computers.+Computer+science&rft.subject=QC+Physics&rft.description=The+information+system+(T.V.%2C+newspapers%2C+blogs%2C+social+network+platforms)+and+its+inner+dynamics+play+a+fundamental+role+on+the+evolution+of+collective+debates+and+thus+on+the+public+opinion.+In+this+work+we+address+such+a+process+focusing+on+how+the+current+inner+strategies+of+the+information+system+(competition%2C+customer+satisfaction)+once+combined+with+the+gossip+may+affect+the+opinions+dynamics.+A+reinforcement+effect+is+particularly+evident+in+the+social+network+platforms+where+several+and+incompatible+cultures+coexist+(e.g%2C+pro+or+against+the+existence+of+chemical+trails+and+reptilians%2C+the+new+world+order+conspiracy+and+so+forth).+We+introduce+a+computational+model+of+opinion+dynamics+which+accounts+for+the+coexistence+of+media+and+gossip+as+separated+but+interdependent+mechanisms+influencing+the+opinions+evolution.+Individuals+may+change+their+opinions+under+the+contemporary+pressure+of+the+information+supplied+by+the+media+and+the+opinions+of+their+social+contacts.+We+stress+the+effect+of+the+media+communication+patterns+by+considering+both+the+simple+case+where+each+medium+mimics+the+behavior+of+the+most+successful+one+(in+order+to+maximize+the+audience)+and+the+case+where+there+is+polarization+and+thus+competition+among+media+reported+information+(in+order+to+preserve+and+satisfy+their+segmented+audience).+Finally%2C+we+first+model+the+information+cycle+as+in+the+case+of+traditional+main+stream+media+(i.e%2C+when+every+medium+knows+about+the+format+of+all+the+others)+and+then%2C+to+account+for+the+effect+of+the+Internet%2C+on+more+complex+connectivity+patterns+(as+in+the+case+of+the+web+based+information).+We+show+that+multiple+and+polarized+information+sources+lead+to+stable+configurations+where+several+and+distant+opinions+coexist.+&rft.publisher=ArXiv&rft.date=2013&rft.type=Working+Paper&rft.type=NonPeerReviewed&rft.identifier=++Quattrociocchi%2C+Walter+and+Caldarelli%2C+Guido+and+Scala%2C+Antonio++Influence+of+media+on+collective+debates.++Working+Paper++%23+%2F2013++++ArXiv+++++++(Submitted)+++&rft.relation=http%3A%2F%2Farxiv.org%2Fabs%2F1307.4292