Hi, I am Lechen! I am a first-year Ph.D. Student in Computer Science at University of Illinois Urbana-Champaign, advised by Professor Tal August. I have broad interests in Natural Language Processing and Machine Learning. I am particularly interested in the generalization and robustness of large language models (LLMs), especially their efficient learning and reasoning capabilities in out-of-domain settings. My recent research focuses on evaluating and improving LLM personalization, with the goal of aligning general model behavior more effectively with downstream tasks and user needs.
My first-authored paper SPRIG is finally accepted to ICLR 🎉! This is also my first time to ICLR and Brazil 🇧🇷. Big thanks to all my collaborators for their persistence!
Nov 04, 2025
I will attend EMNLP 2025 and present our paper VeriFact! Can’t wait to visit Suzhou and meet friends!
Apr 15, 2025
I’m excited to share that I’ll be joining UIUC this fall. Looking forward to meeting new friends!
Causally Modeling the Linguistic and Social Factors that Predict Email Response
Yinuo Xu*, Hong Chen*, Sushrita Rakshit*, Aparna Ananthasubramaniam*, Omkar Yadav*, Mingqian Zheng*, Michael Jiang*, Lechen Zhang*, Bowen Yi*, Kenan Alkiek*, Abraham Israeli*, Bangzhao Shu*, Hua Shen*, Jiaxin Pei*, Haotian Zhang*, Miriam Schirmer*, and David Jurgens
In Proceedings of the 2025 Conference of the Nations of the Americas Chapter of the Association for Computational Linguistics: Human Language Technologies (Volume 1: Long Papers), Apr 2025