Mingqian Zheng 郑鸣谦

Hi there!
I am a Ph.D. student in LTI at Carnegie Mellon University, co-advised by Carolyn Rosé and Maarten Sap. I am broadly interested in Natural Language Processing and Computational Social Science.
Previously, I completed my Master’s in Survey and Data Science at the University of Michigan, where I was advised by Yajuan Si. I conducted research on NLP with David Jurgens in the Blablablab and also worked with David Flood as a member of the HPACC team. Prior to that, I got my Bachelor’s at NYU Shanghai with double majors in Mathematics and Data Science (Computer Science Concentration), where I worked with Hongyi Wen on Recommendation Systems.
news
Jun 23, 2025 | Gave an invited talk at Pareto.ai about our recent work on LLM refusals. |
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Sep 19, 2024 | My first paper got accepted to the Findings of EMNLP 2024! See you in Miami!🌴 |
Aug 26, 2024 | Starting my new life chapter at CMU LTI as a PhD student! |
selected publications
- EMNLP FindingsWhen "A Helpful Assistant" Is Not Really Helpful: Personas in System Prompts Do Not Improve Performances of Large Language ModelsarXiv preprint arXiv:2311.10054, 2024
- NAACL 2025Causally Modeling the Linguistic and Social Factors that Predict Email ResponseSep 2024
- preprintLet Them Down Easy! Contextual Effects of LLM Guardrails on User Perceptions and PreferencesSep 2025
- preprintSynthetic Socratic Debates: Examining Persona Effects on Moral Decision and Persuasion DynamicsSep 2025