Eunkyu Eunice Park

🧵Sharing our most-recent work! Critical or Compliant? The Double-Edged Sword of Reasoning in Chain-of-Thought Explanations

Creating user simulators is a key to evaluating and training models for user-facing agentic applications. But are stronger LLMs better user simulators? TL;DR: not really. We ran the largest sim2real study for AI agents to date: 31 LLM simulators vs. 451 real humans across 165 tasks. Here's what we found (co-lead with @sunweiwei12).

🎉 Our paper has been accepted to #ICLR2026! 😆💖 This work was done during my internship at LG AI Research – Superintelligence Lab. As summarized in the project: Deep research requires broad evidence coverage and reliable synthesis. HybridDeepSearcher achieves both by parallel retrieval for breadth with sequential reasoning for depth, supporting scalable search. 🔗 Project page: hybriddeepsearcher.github.io 📄 OpenReview: openreview.net/forum?id=rXpTZ… Huge thanks to my mentors and co-workers for their guidance and support throughout this project. We also plan to release related work soon. Stay tuned! 😊

We are recruiting translators (any language/domain) for an interview study about translation technologies here! Form: forms.gle/jCdZRkyGLyZ8tQ… We will be grateful for all input! 1. Interviews will be on Zoom. 2. Participants will be given a $40 𝗔𝗺𝗮𝘇𝗼𝗻 𝗚𝗶𝗳𝘁 𝗰𝗮𝗿𝗱!

🤔💭What even is reasoning? It's time to answer the hard questions! We built the first unified taxonomy of 28 cognitive elements underlying reasoning Spoiler—LLMs commonly employ sequential reasoning, rarely self-awareness, and often fail to use correct reasoning structures🧠

💞 A huge thank you to my amazing collaborators and mentors - @wes_deng, @VaseVarad, Mingxi Yan, @gunheekim, @MaartenSap, @meslami2 - whom I feel incredibly lucky to work with!

[10/10] 📌 Read the paper here: arxiv.org/abs/2511.12001 Looking forward, we hope this work motivates NLP and HCI communities to design explanation strategies and interaction paradigms that actively encourage critical engagement and uncertainty awareness. ❣️

🧵Sharing our most-recent work! Critical or Compliant? The Double-Edged Sword of Reasoning in Chain-of-Thought Explanations

Hello colleagues and friends! ✨Please help repost and share ✨: I am officially on the job market for 𝘁𝗲𝗻𝘂𝗿𝗲 𝘁𝗿𝗮𝗰𝗸 𝗮𝘀𝘀𝗶𝘀𝘁𝗮𝗻𝘁 𝗽𝗿𝗼𝗳𝗲𝘀𝘀𝗼𝗿 and 𝗶𝗻𝗱𝘂𝘀𝘁𝗿𝘆 𝗿𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗿𝗼𝗹𝗲𝘀 where I can apply my research to real-world AI safety challenges!! My work combines empirical studies and system building to explore topics such as 𝗿𝗲𝘀𝗽𝗼𝗻𝘀𝗶𝗯𝗹𝗲 𝗔𝗜 (𝗥𝗔𝗜), 𝗔𝗜 𝘀𝗮𝗳𝗲𝘁𝘆, 𝗮𝗻𝗱 𝗵𝘂𝗺𝗮𝗻-𝗔𝗜 𝗰𝗼𝗹𝗹𝗮𝗯𝗼𝗿𝗮𝘁𝗶𝗼𝗻. To this end, I develop tools and processes to support responsible AI in real world industry settings, particularly in the contexts of 𝗔𝗜 𝗮𝘂𝗱𝗶𝘁𝗶𝗻𝗴, 𝗿𝗲𝗱-𝘁𝗲𝗮𝗺𝗶𝗻𝗴, 𝗮𝗻𝗱 𝗶𝗺𝗽𝗮𝗰𝘁 𝗮𝘀𝘀𝗲𝘀𝘀𝗺𝗲𝗻𝘁.

I am beyond trilled to present two 🏆 award-winning papers ✨ @ACM_CSCW in beautiful Bergen, Norway!! Broadly, I'm excited to chat about responsible AI, AI auditing and red-teaming, and human-agent interaction. Say hi if we run into each other! 𝐖𝐞𝐀𝐮𝐝𝐢𝐭: 𝐒𝐜𝐚𝐟𝐟𝐨𝐥𝐝𝐢𝐧𝐠 𝐔𝐬𝐞𝐫 𝐀𝐮𝐝𝐢𝐭𝐨𝐫𝐬 𝐚𝐧𝐝 𝐀𝐈 𝐏𝐫𝐚𝐜𝐭𝐢𝐭𝐢𝐨𝐧𝐞𝐫𝐬 𝐢𝐧 𝐀𝐮𝐝𝐢𝐭𝐢𝐧𝐠 𝐆𝐞𝐧𝐞𝐫𝐚𝐭𝐢𝐯𝐞 𝐀𝐈 🏆 Best Paper Awards (Top 1% Submissions) 🔗 dl.acm.org/doi/10.1145/37… 📆 Mon, 20 Oct | PM, CET: Online & AI Harms 𝐒𝐨𝐜𝐢𝐞𝐭𝐚𝐥 𝐈𝐦𝐩𝐚𝐜𝐭 𝐀𝐬𝐬𝐞𝐬𝐬𝐦𝐞𝐧𝐭 𝐟𝐨𝐫 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐲 𝐂𝐨𝐦𝐩𝐮𝐭𝐢𝐧𝐠 𝐑𝐞𝐬𝐞𝐚𝐫𝐜𝐡𝐞𝐫𝐬 🏅 Best Paper Honorable Mention (Top 3% Submissions) 🔗 dl.acm.org/doi/10.1145/37… 📆 Wed, 22 Oct | AM, CET: Toward More Ethical and Transparent Systems and Environments #CSCW2025 #AISafety #ResponsibleAI

I’m ✨ super excited and grateful ✨to announce that I'm part of the 2025 class of #PackardFellows (packard.org/2025fellows). The Packard Foundation and this fellowship will allow me to explore exciting research directions towards culturally responsible and safe AI 🌍🌈

🎉Our "FlashAdventure: A Benchmark for GUI Agents Solving Full Story Arcs in Diverse Adventure Games" is accepted to #EMNLP2025 Main!🎉 We introduce a benchmark of 2D Flash adventure games (room escape, mystery/detective, visual novel, management) for full story completion. 🧵