Research

From message similarity to communicative repertoires in coordinated political advertising

Una Joh, Jennifer Stromer-Galley & Yiqi Li

Under review · targeting ICWSM 2027

Same personality setting, different assistance? Auditing personality controls in AI assistants

Una Joh & Bo Zhang

Under review · targeting CHI 2027

[Working title during blind review]

Memory use and personalization in AI assistants

Una Joh & Bo Zhang

Under review · targeting EACL 2027

Climate communication in the stormy transition of Twitter to X

Una Joh, Christy Khoury, Alex O. Smith, Yiran Duan & Jeff Hemsley

Information, Communication & Society · 29(9), 2716–2734 · 2026

Straddling the boundary of misleading information group: Exploring the association between network brokerage and morality expressions

Yiqi Li, Marina Mitiaeva, Ximeng Deng, Una Joh & Yafei Zhang

Journal of Media Psychology: Theories, Methods, and Applications · 37(5), 323–332 · 2025

Curating virality: Exploring curated logics within #BlackLivesMatter on Twitter/X

Yiran Duan, Jeff Hemsley, Alex O. Smith, Una Joh, LaVerne Gray & Christy Khoury

Social Media + Society · 10(2) · 2024

Who drives online community fragmentation? Disentangling social influence and network structure in cyberbalkanization

Yiqi Li, Aimei Yang & Una Joh

HICSS 60 · forthcoming 2027

Beyond top words: MonoTM for topic modeling with interpretable monosemantic features

Una Joh & Bei Yu

Findings of AACL-IJCNLP 2026 · forthcoming

How growing toxicity manifests: A topic trajectory analysis of U.S. immigration discourse on social media

Una Joh, Yiqi Li & Jeff Hemsley

Proceedings of the International AAAI Conference on Web and Social Media · 20(1), 1129–1158 · 2026

Towards memetic legitimation of knowledge: Memes and cultural heritage

Alex O. Smith, Calvin Cousin, Una Joh, Christy Khoury, Yiran Duan & Jeff Hemsley

Information Research · 30(iConf), 618–626 · 2025

Does Google dream of electric memes? From human to computational culture

Alex O. Smith, Una Joh & Jeff Hemsley

Information Research · 30(iConf), 287–300 · 2025

Comparing climate change content and comments across Instagram Reels, TikTok, and YouTube Shorts and long videos

Yiran Duan, Christy Khoury, Una Joh, Alex O. Smith, Calvin Cousin & Jeff Hemsley

Proceedings of the Association for Information Science and Technology · 61(1), 103–114 · 2024

Multi-modal crisis discourse and collective sensemaking on TikTok

Christy Khoury, Alex O. Smith, Una Joh, Yiran Duan & Jeff Hemsley

Proceedings of the Association for Information Science and Technology · 60(1), 203–212 · 2023

When AI memory fails: Reframing LLM agent memory as a knowledge organization problem

Una Joh, Qiaoyi Liu & Bo Zhang

Association for Information Science and Technology · forthcoming 2026

An indexed account of ephemeral culture: Algorithmic contexts of memes

Alex O. Smith, Una Joh & Jeff Hemsley

Proceedings of the Association for Information Science and Technology · 62(1), 1678–1680 · 2025

Comparing crisis communication on TikTok and YouTube: A case study of the 2023 California floods

Yiran Duan, Christy Khoury, Alex O. Smith, Una Joh & Jeff Hemsley

Proceedings of the Association for Information Science and Technology · 60(1), 949–951 · 2023

A psychological model of narrative diffusion

Una Joh & Joshua Introne

10th International Conference on Computational Social Science · July 2024

Empirical validation of a model of narrative diffusion

Qiusi Sun, Una Joh & Joshua Introne

10th International Conference on Computational Social Science · July 2024