000147645 001__ 147645 000147645 005__ 20241220131256.0 000147645 0247_ $$2doi$$a10.1016/j.isci.2024.111098 000147645 0248_ $$2sideral$$a141102 000147645 037__ $$aART-2024-141102 000147645 041__ $$aeng 000147645 100__ $$aFerraz de Arruda, Henrique 000147645 245__ $$aEcho chamber formation sharpened by priority users 000147645 260__ $$c2024 000147645 5060_ $$aAccess copy available to the general public$$fUnrestricted 000147645 5203_ $$aOn social media platforms, priority users (e.g., verified profiles on X) are users whose posts are promoted by recommendation algorithms. However, their influence on opinion dynamics, in particular polarization and echo chamber formation, is not well understood. Through computational modeling, we investigate this influence in a stylized setting. By introducing priority user accounts, we find that prioritization can mitigate polarization. However, by incorporating stubborn user behavior, we find that the results change and that priority accounts can exacerbate the formation of echo chambers. In other words, a minority of extremist ideologues can trigger a transition from consensus to polarization. Our study suggests careful monitoring of platform prioritization policies to prevent potential misuse of users with enhanced influence. 000147645 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E36-23R-FENOL$$9info:eu-repo/grantAgreement/ES/DGA/FONDO-C19-UZ-164255$$9info:eu-repo/grantAgreement/ES/MICINN/PID2020-115800GB-I00$$9info:eu-repo/grantAgreement/ES/UZ/UZ-SANTANDER/2020-0274 000147645 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc$$uhttp://creativecommons.org/licenses/by-nc/3.0/es/ 000147645 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000147645 700__ $$aAndrade Oliveira, Kleber 000147645 700__ $$0(orcid)0000-0002-0895-1893$$aMoreno, Yamir$$uUniversidad de Zaragoza 000147645 7102_ $$12004$$2405$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cÁrea Física Teórica 000147645 773__ $$g27, 11 (2024), 111098 [15 pp.]$$piScience$$tISCIENCE$$x2589-0042 000147645 8564_ $$s3589135$$uhttps://zaguan.unizar.es/record/147645/files/texto_completo.pdf$$yVersión publicada 000147645 8564_ $$s1159725$$uhttps://zaguan.unizar.es/record/147645/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000147645 909CO $$ooai:zaguan.unizar.es:147645$$particulos$$pdriver 000147645 951__ $$a2024-12-20-12:01:09 000147645 980__ $$aARTICLE