Longjie Guo

Pronounce my name: long-ji-eh

Email: longjie [at] uw [dot] edu

I am a 3rd-year PhD Candidate in the Information School at the University of Washington, advised by Prof. Alexis Hiniker.

My research lies in human-computer interaction (HCI) and human-centered AI. I am interested in:

• Leveraging multimodal LLMs and GUI agents for user interface understanding and optimization, with applications in digital well-being, countering deceptive design, and usability evaluation and improvement
• Evaluating and building more trustworthy, human-centered GUI agents that navigate digital environments

Previously, I received my BS in Computer Sciences and Psychology from the University of Wisconsin–Madison, where I worked with Prof. Jacob Thebault-Spieker on social computing. I also worked on the EduSense project through the REUSE program at Carnegie Mellon University.

Selected Publications

SusBench: An Online Benchmark for Evaluating Dark Pattern Susceptibility of Computer-Use Agents

Longjie Guo, Chenjie Yuan*, Mingyuan Zhong*, Robert Wolfe, Ruican Zhong, Yue Xu, Bingbing Wen, Hua Shen, Lucy Lu Wang, Alexis Hiniker

IUI 2026

What Social Media Use Do People Regret? An Analysis of 34K Smartphone Screenshots with Multimodal LLM

Longjie Guo, Yue Fu, Xiran Lin, Xuhai Xu, Yung-Ju Chang, Alexis Hiniker

CHI 2025

Beyond One-Way Influence: Bidirectional Opinion Dynamics in Multi-Turn Human-LLM Interactions

Yuyang Jiang, Longjie Guo*, Yuchen Wu*, Aylin Caliskan, Tanushree Mitra, Hua Shen

CHI 2026 BiAlign Workshop

Productivity or Equity? Tradeoffs in Volunteer Microtasking in Humanitarian OpenStreetMap

Yaxuan Yin, Longjie Guo, Jacob Thebault-Spieker

CSCW 2024

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