publications

2026

1. Ideology-Based LLMs for Content Moderation

   Stefano Civelli, Pietro Bernardelle, Nardiena A. Pratama, and Gianluca Demartini

   In ACM transactions on intelligent systems and technology, 2026

   arXiv Bib

   @inproceedings{civelli2025ideological,
     author = {Civelli, Stefano and Bernardelle, Pietro and Pratama, Nardiena A. and Demartini, Gianluca},
     title = {Ideology-Based LLMs for Content Moderation},
     booktitle = {ACM transactions on intelligent systems and technology},
     year = {2026}
   }

2. SubData: Bridging Heterogeneous Datasets to Enable Theory-Driven Evaluation of Political and Demographic Perspectives in LLMs

   Pietro Bernardelle, Leon Fröhling, Stefano Civelli, and Gianluca Demartini

   In Proceedings of the 5th Workshop on Perspectivist Approaches to NLP (NLPerspectives) at the 15th Language Resources and Evaluation Conference (LREC), 2026

   arXiv Bib

   @inproceedings{bernardelle2026subdata,
     title = {SubData: Bridging Heterogeneous Datasets to Enable Theory-Driven Evaluation of Political and Demographic Perspectives in LLMs},
     author = {Bernardelle, Pietro and Fr\"{o}hling, Leon and Civelli, Stefano and Demartini, Gianluca},
     booktitle = {Proceedings of the 5th Workshop on Perspectivist Approaches to NLP (NLPerspectives) at the 15th Language Resources and Evaluation Conference (LREC)},
     year = {2026}
   }

3. Political Advertising on Facebook During the 2022 Australian Federal Election: A Social Identity Perspective

   Stefano Civelli, Pietro Bernardelle, Frank Mols, and Gianluca Demartini

   In Proceedings of the International AAAI Conference on Web and Social Media, 2026

   PDF arXiv Bib

   @inproceedings{civelli2025politicaladv2022,
     title = {Political Advertising on Facebook During the 2022 Australian Federal Election: A Social Identity Perspective},
     author = {Civelli, Stefano and Bernardelle, Pietro and Mols, Frank and Demartini, Gianluca},
     booktitle = {Proceedings of the International AAAI Conference on Web and Social Media},
     year = {2026}
   }

4. Towards Detecting Persuasion on Social Media: From Model Development to Insights on Persuasion Strategies

   Elyas Meguellati, Stefano Civelli, Pietro Bernardelle, Shazia Sadiq, and 2 more authors

   In Proceedings of the International AAAI Conference on Web and Social Media, 2026

   PDF arXiv Bib

   @inproceedings{meguellati2026spotting,
     title = {Towards Detecting Persuasion on Social Media: From Model Development to Insights on Persuasion Strategies},
     author = {Meguellati, Elyas and Civelli, Stefano and Bernardelle, Pietro and Sadiq, Shazia and King, Irwin and Demartini, Gianluca},
     booktitle = {Proceedings of the International AAAI Conference on Web and Social Media},
     year = {2026},
   }

2025

1. Mapping and Influencing the Political Ideology of Large Language Models using Synthetic Personas

   Pietro Bernardelle, Leon Fröhling, Stefano Civelli, Riccardo Lunardi, and 2 more authors

   In Companion Proceedings of the ACM on Web Conference, 2025

   DOI PDF arXiv Bib

   @inproceedings{bernardelle2025mapping,
     title = {Mapping and Influencing the Political Ideology of Large Language Models using Synthetic Personas},
     author = {Bernardelle, Pietro and Fr\"{o}hling, Leon and Civelli, Stefano and Lunardi, Riccardo and Roitero, Kevin and Demartini, Gianluca},
     booktitle = {Companion Proceedings of the ACM on Web Conference},
     pages = {864--867},
     year = {2025}
   }

2. The Impact of Persona-based Political Perspectives on Hateful Content Detection

   Stefano Civelli, Pietro Bernardelle, and Gianluca Demartini

   In Companion Proceedings of the ACM on Web Conference, 2025

   DOI PDF arXiv Bib

   @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},
     pages = {1963--1968},
     year = {2025}
   }

2024

1. Optimizing LLMs with Direct Preferences: A Data Efficiency Perspective

   Pietro Bernardelle and Gianluca Demartini

   In Proceedings of the 2024 Annual International ACM SIGIR Conference on Research and Development in Information Retrieval in the Asia Pacific Region, 2024

   DOI PDF arXiv Bib

   @inproceedings{bernardelle2024optimizing,
     title = {Optimizing LLMs with Direct Preferences: A Data Efficiency Perspective},
     author = {Bernardelle, Pietro and Demartini, Gianluca},
     booktitle = {Proceedings of the 2024 Annual International ACM SIGIR Conference on Research and Development in Information Retrieval in the Asia Pacific Region},
     pages = {236--240},
     year = {2024}
   }