Language models now sit between us and much of what we read.

@article{bernardelle2027political,
  author = {Bernardelle, Pietro and Civelli, Stefano and Fr\"{o}hling, Leon and Lunardi, Riccardo and Roitero, Kevin and Demartini, Gianluca},
  title = {Political Ideology Shifts in Large Language Models},
  journal = {Information Processing \& Management},
  publisher = {Elsevier},
  volume = {64},
  number = {2},
  pages = {105124},
  month = feb,
  year = {2027},
  issn = {0306-4573},
  doi = {10.1016/j.ipm.2026.105124},
  arXiv = {2508.16013}
}

@misc{paganelli2026crosslingual,
  title = {Cross-lingual Calibration of Pre-Generation Success Probes for Multilingual LLM Routing},
  author = {Paganelli, Andrea and Civelli, Stefano and Bernardelle, Pietro and Demartini, Gianluca},
  howpublished = {arXiv preprint arXiv:2610.06216},
  arXiv = {2610.06216},
  year = {2026}
}

@inproceedings{bernardelle2026internalsrelevance,
  author = {Bernardelle, Pietro and Mohtadi, Samaneh and Civelli, Stefano and Mackenzie, Joel and Demartini, Gianluca},
  title = {LLMs Encode Relevance as a Layer-Wise Cross-Lingual Signal},
  booktitle = {Proceedings of the 35th International ACM Conference on Knowledge and Information Management (CIKM)},
  arXiv={2607.15555},
  year = {2026}
}

@inproceedings{mohtadi2026personarelevance,
  author = {Mohtadi, Samaneh and Bernardelle, Pietro and Mackenzie, Joel and Demartini, Gianluca},
  title = {Persona Conditioning as an Assessor-Sensitivity Probe for LLM-Based IR Evaluation},
  booktitle = {Proceedings of the 35th International ACM Conference on Knowledge and Information Management (CIKM)},
  arXiv={2608.10385},
  year = {2026}
}

@inproceedings{bernardelle2026contextfactchecking,
  title = {Context Shapes LLMs Retrieval-Augmented Fact-Checking Effectiveness},
  author = {Bernardelle, Pietro and Civelli, Stefano and Roitero, Kevin and Demartini, Gianluca},
  booktitle = {Proceedings of the 1st Workshop on Generative AI for Social Good and Vulnerable Populations (GenAI4SG) at CIKM 2026},
  address = {Rome, Italy},
  arXiv = {2602.14044},
  year = {2026}
}

@inproceedings{civelli-etal-2026-shared,
  title = "A Shared Geometry of Difficulty in Multilingual Language Models",
  author = "Civelli, Stefano  and
  Bernardelle, Pietro  and
  Brunello, Nicol{\`o}  and
  Demartini, Gianluca",
  editor = "Liakata, Maria  and
  Moreira, Viviane P.  and
  Zhang, Jiajun  and
  Jurgens, David",
  booktitle = "Proceedings of the 64th Annual Meeting of the {A}ssociation for {C}omputational {L}inguistics (Volume 2: Short Papers)",
  month = jul,
  year = "2026",
  address = "San Diego, California, United States",
  publisher = "Association for Computational Linguistics",
  url = "https://aclanthology.org/2026.acl-short.66/",
  doi = "10.18653/v1/2026.acl-short.66",
  pages = "796--807",
  ISBN = "979-8-89176-391-3",
  arXiv={2601.12731}
}

@article{civelli2025ideological,
  author = {Civelli, Stefano and Bernardelle, Pietro and Pratama, Nardiena A. and Demartini, Gianluca},
  title = {Ideology-Based LLMs for Content Moderation},
  journal = {ACM Transactions on Intelligent Systems and Technology},
  publisher = {Association for Computing Machinery},
  address = {New York, NY, USA},
  month = apr,
  year = {2026},
  issn = {2157-6904},
  doi = {10.1145/3810946},
  arXiv = {2510.25805}
}

@inproceedings{bernardelle2026subdata,
  title = "{S}ub{D}ata: Bridging Heterogeneous Datasets to Enable Theory-Driven Evaluation of Political and Demographic Perspectives in {LLM}s",
  author = "Bernardelle, Pietro  and
  Froehling, Leon  and
  Civelli, Stefano  and
  Demartini, Gianluca",
  editor = "Dudy, Shiran  and
  Abercrombie, Gavin  and
  Basile, Valerio  and
  Leonardelli, Elisa  and
  Frenda, Simona",
  booktitle = "Proceedings of the Fifth Edition of {NLP}erspectives",
  month = may,
  year = "2026",
  address = "Palma, Mallorca (Spain)",
  publisher = "ELRA Language Resources Association (ELRA)",
  url = "https://aclanthology.org/2026.nlperspectives-1.9/",
  doi = "10.63317/2uppkbro3uvq",
  pages = "84--97",
  arXiv={2412.16783}
}

@article{civelli2025politicaladv2022,
  author = {Civelli, Stefano and Bernardelle, Pietro and Mols, Frank and Demartini, Gianluca},
  title = {Political Advertising on Facebook During the 2022 Australian Federal Election: A Social Identity Perspective},
  journal = {Proceedings of the International AAAI Conference on Web and Social Media},
  publisher = {Association for the Advancement of Artificial Intelligence},
  volume = {20},
  number = {1},
  pages = {563--577},
  month = may,
  year = {2026},
  doi = {10.1609/icwsm.v20i1.42654},
  arXiv = {2511.12426}
}

@article{meguellati2026spotting,
  author = {Meguellati, Elyas and Civelli, Stefano and Bernardelle, Pietro and Sadiq, Shazia and King, Irwin and Demartini, Gianluca},
  title = {Towards Detecting Persuasion on Social Media: From Model Development to Insights on Persuasion Strategies},
  journal = {Proceedings of the International AAAI Conference on Web and Social Media},
  publisher = {Association for the Advancement of Artificial Intelligence},
  volume = {20},
  number = {1},
  pages = {1587--1608},
  month = may,
  year = {2026},
  doi = {10.1609/icwsm.v20i1.42714},
  arXiv = {2503.13844}
}

@inproceedings{bernardelle2025mapping,
  author = {Bernardelle, Pietro and Fr\"{o}hling, Leon and Civelli, Stefano and Lunardi, Riccardo and Roitero, Kevin and Demartini, Gianluca},
  title = {Mapping and Influencing the Political Ideology of Large Language Models using Synthetic Personas},
  booktitle = {Companion Proceedings of the ACM on Web Conference 2025},
  publisher = {Association for Computing Machinery},
  address = {Sydney NSW, Australia},
  pages = {864--867},
  month = may,
  year = {2025},
  doi = {10.1145/3701716.3715578},
  arXiv = {2412.14843}
}

@inproceedings{civelli2025impact,
  author = {Civelli, Stefano and Bernardelle, Pietro and Demartini, Gianluca},
  title = {The Impact of Persona-based Political Perspectives on Hateful Content Detection},
  booktitle = {Companion Proceedings of the ACM on Web Conference 2025},
  publisher = {Association for Computing Machinery},
  address = {Sydney NSW, Australia},
  pages = {1963--1968},
  month = may,
  year = {2025},
  doi = {10.1145/3701716.3718383},
  arXiv = {2502.00385}
}

@inproceedings{bernardelle2024optimizing,
  author = {Bernardelle, Pietro and Demartini, Gianluca},
  title = {Optimizing LLMs with Direct Preferences: A Data Efficiency Perspective},
  booktitle = {Proceedings of the 2024 Annual International ACM SIGIR Conference on Research and Development in Information Retrieval in the Asia Pacific Region},
  publisher = {Association for Computing Machinery},
  address = {Tokyo, Japan},
  pages = {236--240},
  month = dec,
  year = {2024},
  doi = {10.1145/3673791.3698411},
  arXiv = {2410.16586}
}