Hejna, Joey

14 publications

ICLR 2025 Aligning Language Models with Demonstrated Feedback Omar Shaikh, Michelle S. Lam, Joey Hejna, Yijia Shao, Hyundong Justin Cho, Michael S. Bernstein, Diyi Yang

CoRL 2025 Data Retrieval with Importance Weights for Few-Shot Imitation Learning Amber Xie, Rahul Chand, Dorsa Sadigh, Joey Hejna

NeurIPS 2025 Scaffolding Dexterous Manipulation with Vision-Language Models Vincent de Bakker, Joey Hejna, Tyler Ga Wei Lum, Onur Celik, Aleksandar Taranovic, Denis Blessing, Gerhard Neumann, Jeannette Bohg, Dorsa Sadigh

ICLR 2025 Vision Language Models Are In-Context Value Learners Yecheng Jason Ma, Joey Hejna, Chuyuan Fu, Dhruv Shah, Jacky Liang, Zhuo Xu, Sean Kirmani, Peng Xu, Danny Driess, Ted Xiao, Osbert Bastani, Dinesh Jayaraman, Wenhao Yu, Tingnan Zhang, Dorsa Sadigh, Fei Xia

ICLR 2024 Contrastive Preference Learning: Learning from Human Feedback Without Reinforcement Learning Joey Hejna, Rafael Rafailov, Harshit Sikchi, Chelsea Finn, Scott Niekum, W. Bradley Knox, Dorsa Sadigh

CoRL 2024 ReMix: Optimizing Data Mixtures for Large Scale Imitation Learning Joey Hejna, Chethan Anand Bhateja, Yichen Jiang, Karl Pertsch, Dorsa Sadigh

NeurIPS 2024 Scaling Laws for Reward Model Overoptimization in Direct Alignment Algorithms Rafael Rafailov, Yaswanth Chittepu, Ryan Park, Harshit Sikchi, Joey Hejna, W. Bradley Knox, Chelsea Finn, Scott Niekum

ICMLW 2024 Scaling Laws for Reward Model Overoptimization in Direct Alignment Algorithms Rafael Rafailov, Yaswanth Chittepu, Ryan Park, Harshit Sikchi, Joey Hejna, W. Bradley Knox, Chelsea Finn, Scott Niekum

CoRL 2024 So You Think You Can Scale up Autonomous Robot Data Collection? Suvir Mirchandani, Suneel Belkhale, Joey Hejna, Evelyn Choi, Md Sazzad Islam, Dorsa Sadigh

ICML 2023 Distance Weighted Supervised Learning for Offline Interaction Data Joey Hejna, Jensen Gao, Dorsa Sadigh

ICLR 2023 Extreme Q-Learning: MaxEnt RL Without Entropy Divyansh Garg, Joey Hejna, Matthieu Geist, Stefano Ermon

AAAI 2023 Improving Long-Horizon Imitation Through Instruction Prediction Joey Hejna, Pieter Abbeel, Lerrel Pinto

NeurIPS 2023 Inverse Preference Learning: Preference-Based RL Without a Reward Function Joey Hejna, Dorsa Sadigh

ICMLW 2023 Inverse Preference Learning: Preference-Based RL Without a Reward Function Joey Hejna, Dorsa Sadigh