?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Feprints.imtlucca.it%2F2123%2F&rft.title=Opinions+within+media%2C+power+and+gossip&rft.creator=Quattrociocchi%2C+Walter&rft.creator=Conte%2C+Rosaria&rft.creator=Lodi%2C+Elena&rft.subject=QA75+Electronic+computers.+Computer+science&rft.description=Despite+the+increasing+diffusion+of+the+Internet+technology%2C+TV+remains+the+principal+medium+of+communication.+People's+perceptions%2C+knowledge%2C+beliefs+and+opinions+about+matter+of+facts+get+(in)formed+through+the+information+reported+on+by+the+mass-media.+However%2C+a+single+source+of+information+(and+consensus)+could+be+a+potential+cause+of+anomalies+in+the+structure+and+evolution+of+a+society.+Hence%2C+as+the+information+available+(and+the+way+it+is+reported)+is+fundamental+for+our+perceptions+and+opinions%2C+the+definition+of+conditions+allowing+for+a+good+information+to+be+disseminated+is+a+pressing+challenge.+In+this+paper+starting+from+a+report+on+the+last+Italian+political+campaign+in+2008%2C+we+derive+a+socio-cognitive+computational+model+of+opinion+dynamics+where+agents+get+informed+by+different+sources+of+information.+Then%2C+a+what-if+analysis%2C+performed+trough+simulations+on+the+model's+parameters+space%2C+is+shown.+In+particular%2C+the+scenario+implemented+includes+three+main+streams+of+information+acquisition%2C+differing+in+both+the+contents+and+the+perceived+reliability+of+the+messages+spread.+Agents'+internal+opinion+is+updated+either+by+accessing+one+of+the+information+sources%2C+namely+media+and+experts%2C+or+by+exchanging+information+with+one+another.+They+are+also+endowed+with+cognitive+mechanisms+to+accept%2C+reject+or+partially+consider+the+acquired+information.+&rft.publisher=ArXiv&rft.date=2011&rft.type=Working+Paper&rft.type=NonPeerReviewed&rft.identifier=++Quattrociocchi%2C+Walter+and+Conte%2C+Rosaria+and+Lodi%2C+Elena++Opinions+within+media%2C+power+and+gossip.++Working+Paper++%23+%2F2011++++ArXiv+++++++(Submitted)+++&rft.relation=http%3A%2F%2Farxiv.org%2Fabs%2F1102.2336