Woojung Song — accepted AI-conference papers

2026

Non-Collaborative User Simulators for Tool Agents

Jeonghoon Shim, Woojung Song, Cheyon Jin, Seungwon KooK, Yohan Jo

ICLR 2026poster

Tool agents interact with users through multi-turn dialogues to accomplish various tasks. Recent studies have adopted user simulation methods to develop these agents in multi-turn settings. However, existing user simulators tend to be agent-friendly, exhibiting only cooperative behaviors, which fail…

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2025

Value Portrait: Assessing Language Models’ Values through Psychometrically and Ecologically Valid Items

Jongwook Han, Dongmin Choi, Woojung Song, Eun-Ju Lee, Yohan Jo

ACL 2025long

The importance of benchmarks for assessing the values of language models has been pronounced due to the growing need of more authentic, human-aligned responses. However, existing benchmarks rely on human or machine annotations that are vulnerable to value-related biases. Furthermore, the tested scen…

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