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Research

Insults Get Attention, Not Results, for Some U.S. Lawmakers

A new study offers one of the most comprehensive analyses to date of how and why U.S. legislators deploy personal...

Matthew Levendusky
Faculty News

Professor Matthew Levendusky Named Joint Professor at the Annenberg School and the Department of Political Science

In this Q&A, Levendusky reflects on his research and teaching.

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Research

Working in Groups Can Help Republicans and Democrats Agree on Controversial Content Moderation Online

A new study by Professor Damon Centola and alum Douglas Guilbeault explored how content moderators can reach consensus on classifying controversial material online, including inflammatory, offensive, or hateful images.

person coding on desktop computer
Research

OpenAI, DeepSeek, and Google Vary Widely in Identifying Hate Speech

Doctoral candidate Neil Fasching and Associate Professor Yphtach Lelkes have found dramatic differences in how large language models classify hate speech, with especially large variations for language about certain demographic groups, raising concerns about bias and disproportionate harm.

Yphtach Lelkes headshot
Faculty News

Yphtach Lelkes Awarded 2025 Andrew Carnegie Fellowship

Lelkes will study how political hostility is shaped in an overloaded information environment.

Close-up of a person in a white shirt using a smartphone.
Research

Balancing Quantity and Quality: How X/Twitter’s Algorithm Influences Our Consumption of News

A new paper by Penn researchers, including Annenberg doctoral candidate Shengchun Huang, explores the dissemination of news on X/Twitter.

Top of the Capitol Building in Washington D.C. with a waving U.S. flag
Research

New Study Reveals Democrats and Republicans Vastly Underestimate the Diversity of Each Other’s Views

A new study by Annenberg researchers has found that Democrats and Republicans consistently underestimate the diversity of views within each party on hot-button issues like immigration and abortion.

Illustration of a Human brain with electrical activity, flashes and lightning on a blue background.
Research

A New Study Shows How the Brain Processes Partisan Information

Researchers from Annenberg, Columbia University, UC Berkeley, and Dartmouth College used fMRI data to explore how partisan messaging is processed in the brain.

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Research

Unpacking Polarization

A Q&A with Annenberg Associate Professor Yphtach Lelkes, co-director of the Polarization Research Lab.

Close up of the U.S. Supreme Court building
Research

Trust in U.S. Supreme Court Continues to Sink

A new survey by the Annenberg Public Policy Center has found that public trust in the U.S. Supreme Court has continued a downward slide since the court’s 2022 Dobbs decision.