MATTIA SAMORY

Associate professor


email: mattia.samory@uniroma1.it
phone:



WORK EXPERIENCE
2025–ongoing — Associate Professor, Sapienza University of Rome (IT)
2022–2025 — Assistant Professor (RTDb), Sapienza University of Rome (IT)
2021–2022 — Team Leader for Data Science Methods, GESIS Leibniz Institute for the Social Sciences, Cologne (DE)
2019–2022 — Postdoctoral Researcher, GESIS Leibniz Institute for the Social Sciences, Cologne (DE)
2017–2018 — Postdoctoral Researcher, Virginia Tech, Blacksburg (VA, USA)

EDUCATION AND TRAINING
Visiting Scholar – 2016–2017 Georgia Tech, Atlanta (GA, USA)
Doctorate – 2013–2017 — Ph.D. in Information Engineering, University of Padua (IT)
MSc – 2010–2012 — Computer Science and Engineering, University of Padua (IT)
BSc – 2007–2010 — Computer Science and Engineering, University of Padua (IT)

WORK ACTIVITIES
Task Organizer for the International Workshop on Semantic Evaluation (SemEval) Task on Psycholinguistic Conspiracy Marker Extraction and Detection, 2026.
Track Chair for the Demos, Posters, and Datasets Track at the Int. AAAI Conference on Web and Social Media (ICWSM, ggs A) 2025.
Workshop Organizer for the workshop Quantifying Digital Social Spaces and Fields within the conference Correspondence Analysis and Related Methods (CARME), held in Bonn, Germany carme-n.org 2023.
Task Organizer for the International Workshop on Semantic Evaluation (SemEval) Task on Multilingual news article similarity, 2022.
Organizer for the Computational Social Science Summer School, 2019.
Member of the Saperi&Co. Board at Sapienza.

AWARDS
Best Paper Honorable Mention at AAAI ICWSM 2025.
Best Paper at AAAI ICWSM 2022.
Best Paper Honorable Mention at ACM CSCW 2021.
Best Paper Honorable Mention at ACM CSCW 2020.
Best Program Committee/Senior Program Committee at AAAI ICWSM 2019-2024.

COLLABORATIONS
MS is currently involved in collaborative projects including faculty from UCD, UMass Amherst‬, UIUC, Northeastern, BU, UW, Drexel, KIT, GESIS, UMannheim, OVGU.

EDITORIAL ACTIVITY
Senior PC Member of the Int. AAAI Conference on Web and Social Media (ICWSM, ggs A) 2023--
PC member of the Int. AAAI Conference on Web and Social Media (ICWSM, ggs A) 2023–
Int. Conference Computer-Supported Cooperative Work (CSCW, ggs A+) 2023–
Int ACM Conference on Human Factors in Computing Systems (CHI, ggs A++) 2024- • (among others)

Reviewer for the Journals • Nature Communications (sjr Q1) • EPJ Data Science (sjr Q1) • PLoS ONE (sjr Q1) • SN Computer Supported Cooperative Work (sjr Q1) • Online Social Networks and Media (sjr Q1) • ACM Transactions on Social Computing (TSC) (sjr Q2) • (among others)

INVITED PRESENTATIONS
11/2024 Discussant at the Workshop: “Analysis of the emerging figurative language in the public discourse on technoscience”, Padova, Italy.
11/2023 “The computational social science of conspiracy theory communities: from social factors to moderation strategies” at the Conference on Harmful Online Communication (CHOC), Cologne, Germany.
05/2023 “From conspiracy theories to multi-faceted narratives” at GESIS Computational Social Science, Cologne, Germany.
12/2022 “The computational social science of conspiracy theory communities” at the Workshop: Computational Linguistic and Data Science for Social Research, Padova, Italy.
9/2022 Visiting Researcher at GESIS Computational Social Science, Cologne, Germany.

GRANTS
(co-I) GHOST: Protecting User Privacy from Community Detection in Social Networks, research grant in the “large” category at Sapienza University of Rome.
(collaborator) SaTC: CORE: Small: Political misinformation through biased polls, collaborative research funded by NSF.
(co-I) Social media videocracy? A cross-platform and interdisciplinary research on political actors’ audio-visual social media strategies and user engagement responses of young adult voters in the 2024 European elections, research grant in the “large” category at Sapienza University of Rome.
(PI) PNR SEED Grant for the project Conspiracy language on social media: theory-driven automated detection (CONLANG), at Sapienza University of Rome.
(co-I) Meta AI (formerly Facebook Research) – Mephisto funding line.
(deputy PI) VW Artificial Intelligence and the Society of the Future.

ADDITIONAL INFORMATION
MS’s work has been covered by international media, including WIRED Magazine, El País, New Scientist, FOX News, ABC News.

Research products

11573/1750908 - 2025 - MARTSIA: A Tool for Confidential Data Exchange via Public Blockchain
Kryston, Michele; Marangone, Edoardo; Di Ciccio, Claudio; Friolo, Daniele; Nemmi, Eugenio Nerio; Samory, Mattia; Spina, Michele; Venturi, Daniele; Weber, Ingo - 04b Atto di convegno in volume
conference: Intelligent Information Systems - International Conference on Advanced Information Systems Engineering Forum 2025 (Vienna, Austria)
book: Intelligent Information Systems. CAiSE 2025 - ()

11573/1732051 - 2025 - From Volunteerism to Corporatization: Analyzing Participation in the 2015 and 2023 Reddit Blackouts
Schmitz, Andreas; Samory, Mattia - 01a Articolo in rivista
paper: SOCIAL MEDIA + SOCIETY (London : SAGE Publications Ltd, 2015-) pp. - - issn: 2056-3051 - wos: (0) - scopus: 2-s2.0-85215518773 (1)

11573/1713696 - 2024 - Global News Synchrony and Diversity During the Start of the COVID-19 Pandemic
Chen, Xi; Hale, Scott A.; Jurgens, David; Samory, Mattia; Zuckerman, Ethan; Grabowicz, Przemyslaw A. - 04b Atto di convegno in volume
conference: WWW '24 The Web Conference 2024 (Singapore)
book: WWW '24: Proceedings of the ACM on Web Conference 2024 - (9798400701719)

11573/1713707 - 2024 - A Multilingual Similarity Dataset for News Article Frame
Chen, Xi; Samory, Mattia; Hale, Scott; Jurgens, David; Grabowicz, Przemyslaw A. - 04b Atto di convegno in volume
conference: Eighteenth International AAAI Conference on Web and Social Media - ICWSM '24 (Buffalo, NY)
book: Vol. 18 (2024): Proceedings of the Eighteenth International AAAI Conference on Web and Social Media - ()

11573/1713712 - 2024 - Analyzing Support for U.S. Presidential Candidates in Twitter Polls
Scarano, Stephen; Vasudevan, Vijayalakshmi; Samory, Mattia; Yang, Junghwan; Grabowicz, Przemyslaw - 01a Articolo in rivista
paper: JOURNAL OF QUANTITATIVE DESCRIPTION: DIGITAL MEDIA (Zurich : Journal of Quantitative Description Department of Communication and Media Research University of Zurich, 26.04.2021-) pp. - - issn: 2673-8813 - wos: (0) - scopus: (0)

11573/1713695 - 2024 - The Unseen Targets of Hate: A Systematic Review of Hateful Communication Datasets
Yu, Zehui; Sen, Indira; Assenmacher, Dennis; Samory, Mattia; Fröhling, Leon; Dahn, Christina; Nozza, Debora; Wagner, Claudia - 01a Articolo in rivista
paper: SOCIAL SCIENCE COMPUTER REVIEW (Sage Periodicals Incorporated:2455 Teller Road:Thousand Oaks, CA 91320:(805)499-0721, EMAIL: order@sagepub.com, INTERNET: http://www.sagepub.com, Fax: (805)499-0871) pp. - - issn: 0894-4393 - wos: WOS:001246368900001 (3) - scopus: 2-s2.0-85196153261 (2)

11573/1696238 - 2023 - People Make Better Edits: Measuring the Efficacy of {LLM}-Generated Counterfactually Augmented Data for Harmful Language Detection
Sen, Indira; Assenmacher, Dennis; Samory, Mattia; Augenstein, Isabelle; Van Der Aalst, Wil; Wagner, Claudia - 04b Atto di convegno in volume
conference: Conference on Empirical Methods in Natural Language Processing (Singapore)
book: Proceedings of the 2023 Conference on Empirical Methods in Natural Language Processing - ()

11573/1655744 - 2022 - SemEval-2022 Task 8: Multilingual news article similarity
Chen, Xi; Zeynali, Ali; Camargo, Chico; Flöck, Fabian; Gaffney, Devin; Grabowicz, Przemyslaw; Hale, Scott; Jurgens, David; Samory, Mattia - 04b Atto di convegno in volume
conference: International Workshop on Semantic Evaluation, SemEval 2022 (Seattle, United States)
book: Proceedings of the 16th International Workshop on Semantic Evaluation (SemEval-2022) - ()

11573/1655743 - 2022 - Counterfactually Augmented Data and Unintended Bias: The Case of Sexism and Hate Speech Detection
Sen, I.; Samory, M.; Wagner, C.; Augenstein, I. - 04b Atto di convegno in volume
conference: 2022 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, NAACL 2022 (Seattle, United States)
book: NAACL 2022 - 2022 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, Proceedings of the Conference - ()

11573/1696231 - 2021 - What Makes People Join Conspiracy Communities? Role of Social Factors in Conspiracy Engagement
Phadke, S.; Samory, M.; Mitra, T. - 01a Articolo in rivista
paper: PROCEEDINGS OF THE ACM ON HUMAN-COMPUTER INTERACTION (New York NY: Association for Computing Machinery Inc., 2017-) pp. 1-30 - issn: 2573-0142 - wos: (0) - scopus: 2-s2.0-85178023694 (47)

11573/1655745 - 2021 - Characterizing Social Imaginaries and Self-Disclosures of Dissonance in Online Conspiracy Discussion Communities
Phadke, Shruti; Samory, Mattia; Mitra, Tanushree - 01a Articolo in rivista
paper: PROCEEDINGS OF THE ACM ON HUMAN-COMPUTER INTERACTION (New York NY: Association for Computing Machinery Inc., 2017-) pp. 1-35 - issn: 2573-0142 - wos: (0) - scopus: 2-s2.0-85113607747 (16)

11573/1655746 - 2021 - How Does Counterfactually Augmented Data Impact Models for Social Computing Constructs?
Sen, Indira; Samory, Mattia; Flöck, Fabian; Wagner, Claudia; Augenstein, Isabelle - 04b Atto di convegno in volume
conference: Conference on Empirical Methods in Natural Language Processing (Online and Punta Cana, Dominican Republic)
book: Proceedings of the 2021 Conference on Empirical Methods in Natural Language Processing - ()

11573/1655747 - 2020 - Characterizing the social media news sphere through user co-sharing practices
Samory, M.; Abnousi, V. K.; Mitra, T. - 04b Atto di convegno in volume
conference: 14th International AAAI Conference on Web and Social Media, ICWSM 2020 (online)
book: Proceedings of the 14th International AAAI Conference on Web and Social Media, ICWSM 2020 - ()

11573/1655748 - 2019 - SENPAI: Supporting exploratory text analysis through semantic & syntactic pattern inspection
Samory, M.; Mitra, T. - 04b Atto di convegno in volume
conference: 13th International Conference on Web and Social Media, ICWSM 2019 (Munich, DE)
book: Proceedings of the 13th International Conference on Web and Social Media, ICWSM 2019 - ()

11573/1655750 - 2018 - The Internet’s hidden rules: An empirical study of Reddit norm violations at micro, meso, and macro scales
Chandrasekharan, E.; Samory, M.; Jhaver, S.; Charvat, H.; Bruckman, A.; Lampe, C.; Eisenstein, J.; Gilbert, E. - 01a Articolo in rivista
paper: PROCEEDINGS OF THE ACM ON HUMAN-COMPUTER INTERACTION (New York NY: Association for Computing Machinery Inc., 2017-) pp. 1-25 - issn: 2573-0142 - wos: (0) - scopus: 2-s2.0-85065831427 (221)

11573/1655751 - 2018 - Framing hate with hate frames: Designing the codebook
Phadke, S.; Lloyd, J.; Hawdon, J.; Samory, M.; Mitra, T. - 04b Atto di convegno in volume
conference: 21st ACM Conference on Computer-Supported Cooperative Work and Social Computing, CSCW 2018 (Jersey City, NY, USA)
book: Proceedings of the ACM Conference on Computer Supported Cooperative Work, CSCW - (9781450360180)

11573/1655749 - 2018 - “The government spies using our webcams:” The language of conspiracy theories in online discussions
Samory, M.; Mitra, T. - 01a Articolo in rivista
paper: PROCEEDINGS OF THE ACM ON HUMAN-COMPUTER INTERACTION (New York NY: Association for Computing Machinery Inc., 2017-) pp. 1-24 - issn: 2573-0142 - wos: (0) - scopus: 2-s2.0-85066422062 (45)

11573/1655752 - 2018 - Conspiracies online: User discussions in a conspiracy community following dramatic events
Samory, M.; Mitra, T. - 04b Atto di convegno in volume
conference: 12th International AAAI Conference on Web and Social Media, ICWSM 2018 (Stanford University, usa)
book: 12th International AAAI Conference on Web and Social Media, ICWSM 2018 - ()

11573/1655754 - 2017 - The bag of communities: Identifying abusive behavior online with preexisting internet data
Chandrasekharan, E.; Samory, M.; Srinivasan, A.; Gilbert, E. - 04b Atto di convegno in volume
conference: 2017 ACM SIGCHI Conference on Human Factors in Computing Systems, CHI 2017 (Denver, CO, USA)
book: Conference on Human Factors in Computing Systems - Proceedings - (9781450346559)

11573/1655755 - 2017 - Quotes reveal community structure and interaction dynamics
Samory, M.; Cappelleri, V. -M.; Peserico, E. - 04b Atto di convegno in volume
conference: 2017 ACM Conference on Computer Supported Cooperative Work and Social Computing, CSCW 2017 (Portland, OR, USA)
book: Proceedings of the ACM Conference on Computer Supported Cooperative Work, CSCW - (9781450343350)

11573/1655753 - 2017 - Sizing up the troll: A quantitative characterization of moderator-identified trolling in an online forum
Samory, M.; Peserico, E. - 04b Atto di convegno in volume
conference: 2017 ACM SIGCHI Conference on Human Factors in Computing Systems, CHI 2017 (Denver, CO, USA)
book: Conference on Human Factors in Computing Systems - Proceedings - (9781450346559)

11573/1655756 - 2017 - How user condition affects community dynamics in a forum on autism
Samory, M.; Pizzi, C.; Peserico, E. - 04b Atto di convegno in volume
conference: 11th International Conference on Web and Social Media, ICWSM 2017 (Montreal, CA)
book: Proceedings of the 11th International Conference on Web and Social Media, ICWSM 2017 - ()

11573/1655757 - 2016 - Community structure and interaction dynamics through the lens of quotes
Samory, M.; Bogo, F.; Peserico, E. - 04b Atto di convegno in volume
conference: 8th ACM Web Science Conference, WebSci 2016 (Hannover, DE)
book: WebSci 2016 - Proceedings of the 2016 ACM Web Science Conference - (9781450342087)

11573/1655758 - 2016 - Content attribution ignoring content
Samory, M.; Peserico, E. - 04b Atto di convegno in volume
conference: 8th ACM Web Science Conference, WebSci 2016 (Hannover, DE)
book: WebSci 2016 - Proceedings of the 2016 ACM Web Science Conference - (9781450342087)

11573/1655759 - 2015 - Quotes in forum.rpg.net
Samory, M.; Peserico, E. - 04b Atto di convegno in volume
conference: 7th ACM Web Science Conference, WebSci 2015 (University of Oxford, gbr)
book: Proceedings of the 2015 ACM Web Science Conference - (9781450336727)

11573/1655760 - 2014 - The counterpoint game: Rules, constraints and computational spaces
Samory, M.; Mandanici, M.; Canazza, S.; Peserico, E. - 04b Atto di convegno in volume
conference: 40th International Computer Music Conference, ICMC 2014, Joint with the 11th Sound and Music Computing Conference, SMC 2014 - Music Technology Meets Philosophy: From Digital Echos to Virtual Ethos (Athens, Greece)
book: Proceedings - 40th International Computer Music Conference, ICMC 2014 and 11th Sound and Music Computing Conference, SMC 2014 - Music Technology Meets Philosophy: From Digital Echos to Virtual Ethos - ()

11573/1655761 - 2012 - Psoriasis segmentation through chromatic regions and Geometric Active Contours
Bogo, F.; Samory, M.; Belloni Fortina, A.; Piaserico, S.; Peserico, E. - 04b Atto di convegno in volume
conference: 34th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS 2012 (San Diego, CA, usa)
book: Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS - (978-1-4577-1787-1; 978-1-4244-4119-8; 978-1-4577-1787-1)

© Università degli Studi di Roma "La Sapienza" - Piazzale Aldo Moro 5, 00185 Roma