14 citations · 39 across the 19 of their papers we have counts for
20 papers
Reddit's Globalization over Twenty Years: Inferring Community Time Zone from Activity Timestamps
Franco Della Negra, Mattia Samory, Matteo Cinelli
Online communities are a global phenomenon, but assessing their actual geographical spread requires accurate and scalable measurement. We propose and evaluate methods that infer th…
The Gray Area: Characterizing Moderator Disagreement on Reddit
Shayan Alipour, Shruti Phadke, Seyed Shahabeddin Mousavi +3
Volunteer moderators play a crucial role in sustaining online dialogue, but they often disagree about what should or should not be allowed. In this paper, we study the complexity o…
Asking For It: Question-Answering for Predicting Rule Infractions in Online Content Moderation
Mattia Samory, Diana Pamfile, Andrew To +1
Online communities rely on a mix of platform policies and community-authored rules to define acceptable behavior and maintain order. However, these rules vary widely across communi…
Generative Exaggeration in LLM Social Agents: Consistency, Bias, and Toxicity
Jacopo Nudo, Mario Edoardo Pandolfo, Edoardo Loru +3
We investigate how Large Language Models (LLMs) behave when simulating political discourse on social media. Leveraging 21 million interactions on X during the 2024 U.S. presidentia…
Robustness and Confounders in the Demographic Alignment of LLMs with Human Perceptions of Offensiveness
Shayan Alipour, Indira Sen, Mattia Samory +1
Large language models (LLMs) are known to exhibit demographic biases, yet few studies systematically evaluate these biases across multiple datasets or account for confounding facto…
MARTSIA: A Tool for Confidential Data Exchange via Public Blockchain
Michele Kryston, Edoardo Marangone, Claudio Di Ciccio +6
Blockchain technology streamlines multi-party collaborations in decentralized settings, especially when trust is limited or difficult to establish. While public blockchains enhance…
Analyzing and Estimating Support for U.S. Presidential Candidates in Twitter Polls
Stephen Scarano, Vijayalakshmi Vasudevan, Chhandak Bagchi +3
Polls posted on social media have emerged in recent years as an important tool for estimating public opinion, e.g., to gauge public support for business decisions and political can…
A Multilingual Similarity Dataset for News Article Frame
Xi Chen, Mattia Samory, Scott Hale +2
Understanding the writing frame of news articles is vital for addressing social issues, and thus has attracted notable attention in the fields of communication studies. Yet, assess…
Election Polls on Social Media: Prevalence, Biases, and Voter Fraud Beliefs
Stephen Scarano, Vijayalakshmi Vasudevan, Mattia Samory +3
Social media platforms allow users to create polls to gather public opinion on diverse topics. However, we know little about what such polls are used for and how reliable they are,…
The Unseen Targets of Hate -- A Systematic Review of Hateful Communication Datasets
Zehui Yu, Indira Sen, Dennis Assenmacher +5
Machine learning (ML)-based content moderation tools are essential to keep online spaces free from hateful communication. Yet, ML tools can only be as capable as the quality of the…
Global News Synchrony and Diversity During the Start of the COVID-19 Pandemic
Xi Chen, Scott A. Hale, David Jurgens +3
News coverage profoundly affects how countries and individuals behave in international relations. Yet, we have little empirical evidence of how news coverage varies across countrie…
People Make Better Edits: Measuring the Efficacy of LLM-Generated Counterfactually Augmented Data for Harmful Language Detection
Indira Sen, Dennis Assenmacher, Mattia Samory +3
NLP models are used in a variety of critical social computing tasks, such as detecting sexist, racist, or otherwise hateful content. Therefore, it is imperative that these models a…
The Hipster Paradox in Electronic Dance Music: How Musicians Trade Mainstream Success off against Alternative Status
Mohsen Jadidi, Haiko Lietz, Mattia Samory +1
The hipster paradox in Electronic Dance Music is the phenomenon that commercial success is collectively considered illegitimate while serious and aspiring professional musicians st…
Counterfactually Augmented Data and Unintended Bias: The Case of Sexism and Hate Speech Detection
Indira Sen, Mattia Samory, Claudia Wagner +1
Counterfactually Augmented Data (CAD) aims to improve out-of-domain generalizability, an indicator of model robustness. The improvement is credited with promoting core features of…
Pathways through Conspiracy: The Evolution of Conspiracy Radicalization through Engagement in Online Conspiracy Discussions
Shruti Phadke, Mattia Samory, Tanushree Mitra
The disruptive offline mobilization of participants in online conspiracy theory (CT) discussions has highlighted the importance of understanding how online users may form radicaliz…
How Does Counterfactually Augmented Data Impact Models for Social Computing Constructs?
Indira Sen, Mattia Samory, Fabian Floeck +2
As NLP models are increasingly deployed in socially situated settings such as online abusive content detection, it is crucial to ensure that these models are robust. One way of imp…
Characterizing Social Imaginaries and Self-Disclosures of Dissonance in Online Conspiracy Discussion Communities
Shruti Phadke, Mattia Samory, Tanushree Mitra
Online discussion platforms offer a forum to strengthen and propagate belief in misinformed conspiracy theories. Yet, they also offer avenues for conspiracy theorists to express th…
What Makes People Join Conspiracy Communities?: Role of Social Factors in Conspiracy Engagement
Shruti Phadke, Mattia Samory, Tanushree Mitra
Widespread conspiracy theories, like those motivating anti-vaccination attitudes or climate change denial, propel collective action and bear society-wide consequences. Yet, empiric…
"Call me sexist, but...": Revisiting Sexism Detection Using Psychological Scales and Adversarial Samples
Mattia Samory, Indira Sen, Julian Kohne +2
Research has focused on automated methods to effectively detect sexism online. Although overt sexism seems easy to spot, its subtle forms and manifold expressions are not. In this…
Community structure and interaction dynamics through the lens of quotes
Mattia Samory, Enoch Peserico
This is the first work investigating community structure and interaction dynamics through the lens of quotes in online discussion forums. We examine four forums of different size,…