I’m a PhD student at the Center for Computational Analysis of Social and Organizational Systems (CASOS) and Center for Informed Democracy & Social - cybersecurity (IDeaS) at Carnegie Mellon University, advised by Dr. Kathleen M. Carley and Dr. Patrick Park.
My research primarily focuses on modeling trust in digital news media. To this end, my work assesses source credibility in digital news media and develops interventions to promote credible sources in information systems such as search engines. Given media trust is declining over time, I am interested in the wider set of factors that affect media trust, audience behavior, and media literacy. The methods I use for this research place me at the intersection of computational social science and media studies.
In the past I was lucky to be supervised by Dr. Ashok Goel in the Design Intelligence Laboratory (DILab) at Georgia Insitute of Technology, researching the roles of intellgient agents in educational environments. Prior to this, I developed machine learning trust and safety systems at Meta, where my work has been deployed in areas of such as coordinated inauthentic behavior and election integrity.
Representative Publications
Measuring Organizational Influence on Digital News: An Information-Theoretic Framework for Media Pluralism and Editorial Independence
Peter Carragher, Kathleen M. Carley
Under review at The Web Conference (WWW) 2027. 2026.
preprint
pdf
Who Owns Digital News, and Who Gets Cited: Measuring Media Concentration Across 77 Countries and Seven AI Systems
Peter Carragher, Kathleen M. Carley
Under review at The Web Conference (WWW) 2027. 2026.
preprint
pdf . demo . data
Misinformation Resilient Search Rankings with Webgraph-based Interventions
Peter Carragher, Evan M. Williams, Kathleen M. Carley
ACM Transactions on Intelligent Systems and Technology: Special Issue on Responsible Recommender Systems. 2025.
journal article
pdf . webgraph . code . data . slides
Bridging Social Media and Search Engines: Dredge Words and the Detection of Unreliable Domains
Evan M. Williams, Peter Carragher, Kathleen M. Carley
ICWSM 2025: The 19th International AAAI Conference on Web and Social Media. 2025.
conference paper
pdf . code
Detection and Discovery of Misinformation Sources using Attributed Webgraphs
Peter Carragher, Evan M. Williams, Kathleen M. Carley
ICWSM 2024: The 18th International AAAI Conference on Web and Social Media. 2024.
conference paper
pdf . webgraph . code . data . slides