🎓 Integrated M.S.-Ph.D. in Data Science at Seoul National University (September 2025 ~ )
🎓 B.I.S. in Information Systems at Hanyang University (GPA: 4.35 / 4.50)
🧑🏫 Advised by Yohan Jo · HOLI Lab (Human-Oriented Language Intelligence)
🔬 Research Interests: AI Agents · Value Alignment
"The pessimist sees difficulty in every opportunity. The optimist sees opportunity in every difficulty. - Winston Churchill"
I believe agents can already solve many of the problems we face in the real world. Still, people want better agents, and I don't think we get there just by making models code or complete tasks more accurately. We get there by understanding how agents actually behave, and what values they carry while doing so. My research covers these two sides: Agents and Value Alignment.
- Agents. Looking beyond whether an agent succeeds or fails: in which environments agents work well, where they break down, and how they behave along the way.
- Value Alignment. Uncovering the values LLMs actually hold and how those values show up in real interactions, aiming for human-like LLMs with a growing interest in social agents and simulation.
I'm currently looking for a summer internship and always open to collaboration. Feel free to reach out!
| 🏅 | Presidential Science Scholarship for Graduate Students (2026 – 2027) Ministry of Science and ICT · selected at a 25:1 competition ratio |
| 🏅 | Busan Mayor's Award (2026) DIVE Competition · 2nd Place · also 1st Place from Busan Metropolitan Corporation |
| 🏅 | Chuncheon Mayor's Award (2025) Chuncheon Generative AI Competition · 3rd Place |
| 🏅 | Busan Mayor's Award (2024) DIVE Competition, App and Service Development · 3rd Place · also 1st Place from Korea Railroad Corporation Busan-Gyeongnam HQ |
Agents Trust Tools Too Much: Measuring Reliance on Unreliable Tools
Under review, 2026
Hoyeol Yang*, Woojung Song*, Taewon Kim, Jonghyun Song, Seoyeon Park, Yohan Jo
*Co-first authors
ArcANE: Do Role-Playing Language Agents Stay in Character at the Right Time?
[EMNLP] Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing (Main), 2026
Woojung Song*, Nalim Kim*, Sangjun Song, Chaewon Heo, Jongwon Lim, Yohan Jo
*Co-first authors
Project · Code
Human Psychometric Questionnaires Mischaracterize LLM Behavior
[EMNLP] Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing (Main), 2026
Woojung Song*, Dongmin Choi*, Yoonah Park, Jongwook Han, Eun-Ju Lee, Yohan Jo
*Co-first authors
Project · Code
Don't Adapt Small Language Models for Tools; Adapt Tool Schemas to the Models
[ACL] Proceedings of the 64th Annual Meeting of the Association for Computational Linguistics (Main), 2026
Jonggeun Lee*, Woojung Song*, Jongwook Han, Haesung Pyun, Yohan Jo
*Co-first authors
Project · Code
Non-Collaborative User Simulators for Tool Agents
[ICLR] The Fourteenth International Conference on Learning Representations, 2026
Jeonghoon Shim, Woojung Song, Cheyon Jin, Seungwon Kook, Yohan Jo
Project · Code
Psychometric Item Validation Using Virtual Respondents with Trait-Response Mediators
[TACL] Transactions of the Association for Computational Linguistics, 2026
Sungjib Lim, Woojung Song, Eun-Ju Lee, Yohan Jo
Project · Code
Quantifying Data Contamination in Psychometric Evaluations of LLMs
[EACL Findings] Findings of the Association for Computational Linguistics: EACL, 2026
Jongwook Han*, Woojung Song*, Jonggeun Lee*, Yohan Jo
*Co-first authors
Project · Code
Value Portrait: Assessing Language Models' Values through Psychometrically and Ecologically Valid Items
[ACL] Proceedings of the 63rd Annual Meeting of the Association for Computational Linguistics (Main), 2025
Jongwook Han*, Dongmin Choi*, Woojung Song*, Eun-Ju Lee, Yohan Jo
*Co-first authors
Project · Code
Interpretable Prediction of Private Brand Purchases by Pet Type in E-Commerce for Consumer Behavior Analysis Using Real-World Transaction Data
PeerJ Computer Science, 2026
Jaehyuk Lee*, Woojung Song*, Jina Kim, Yoona Chung, Eunchan Kim
*Co-first authors
Republic of Korea Army – Sergeant (KATUSA)
Mandatory military service · 3 BSB, 1 ABCT, 3ID, Camp Humphreys, South Korea (2020 – 2021)