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Preference-based reinforcement learning (PbRL) can enable robots to learn to perform tasks based on an individual's preferences without requiring a hand-crafted reward function. However, existing approaches either assume access to a…

Machine Learning · Computer Science 2024-02-13 Yi Liu , Gaurav Datta , Ellen Novoseller , Daniel S. Brown

Reinforcement Learning (RL) algorithms suffer from the dependency on accurately engineered reward functions to properly guide the learning agents to do the required tasks. Preference-based reinforcement learning (PbRL) addresses that by…

Artificial Intelligence · Computer Science 2024-08-23 Youssef Abdelkareem , Shady Shehata , Fakhri Karray

Preference-based reinforcement learning (PbRL) is an approach that enables RL agents to learn from preference, which is particularly useful when formulating a reward function is challenging. Existing PbRL methods generally involve a…

Machine Learning · Computer Science 2023-10-30 Gaon An , Junhyeok Lee , Xingdong Zuo , Norio Kosaka , Kyung-Min Kim , Hyun Oh Song

Preference-based reinforcement learning (PbRL) is emerging as a promising approach to teaching robots through human comparative feedback, sidestepping the need for complex reward engineering. However, the substantial volume of feedback…

Robotics · Computer Science 2025-01-09 Ruiqi Wang , Dezhong Zhao , Ziqin Yuan , Ike Obi , Byung-Cheol Min

Preference-based Reinforcement Learning (PbRL) is a paradigm in which an RL agent learns to optimize a task using pair-wise preference-based feedback over trajectories, rather than explicit reward signals. While PbRL has demonstrated…

Machine Learning · Computer Science 2024-04-18 Wenhao Zhan , Masatoshi Uehara , Wen Sun , Jason D. Lee

Preference-based reinforcement learning (PbRL) aligns a robot behavior with human preferences via a reward function learned from binary feedback over agent behaviors. We show that dynamics-aware reward functions improve the sample…

Artificial Intelligence · Computer Science 2024-02-29 Katherine Metcalf , Miguel Sarabia , Natalie Mackraz , Barry-John Theobald

Preference-based reinforcement learning (PbRL) is a suitable approach for style adaptation of pre-trained robotic behavior: adapting the robot's policy to follow human user preferences while still being able to perform the original task.…

Human-in-the-loop reinforcement learning allows the training of agents through various interfaces, even for non-expert humans. Recently, preference-based methods (PbRL), where the human has to give his preference over two trajectories,…

Artificial Intelligence · Computer Science 2024-08-06 Jakob Karalus

Preference-based reinforcement learning (PbRL) has shown impressive capabilities in training agents without reward engineering. However, a notable limitation of PbRL is its dependency on substantial human feedback. This dependency stems…

Machine Learning · Computer Science 2024-05-30 Fengshuo Bai , Rui Zhao , Hongming Zhang , Sijia Cui , Ying Wen , Yaodong Yang , Bo Xu , Lei Han

Preference-based reinforcement learning (PbRL) has emerged as a promising approach for learning behaviors from human feedback without predefined reward functions. However, current PbRL methods face a critical challenge in effectively…

Artificial Intelligence · Computer Science 2025-06-17 Brahim Driss , Alex Davey , Riad Akrour

Preference-based Reinforcement Learning (PbRL) replaces reward values in traditional reinforcement learning by preferences to better elicit human opinion on the target objective, especially when numerical reward values are hard to design or…

Machine Learning · Computer Science 2020-10-27 Yichong Xu , Ruosong Wang , Lin F. Yang , Aarti Singh , Artur Dubrawski

Preference-based reinforcement learning (PbRL) provides a natural way to align RL agents' behavior with human desired outcomes, but is often restrained by costly human feedback. To improve feedback efficiency, most existing PbRL methods…

Machine Learning · Computer Science 2024-07-08 Xiao Hu , Jianxiong Li , Xianyuan Zhan , Qing-Shan Jia , Ya-Qin Zhang

Preference-based Reinforcement Learning (PbRL) enables policy learning through simple queries comparing trajectories from a single policy. While human responses to these queries make it possible to learn policies aligned with human…

Robotics · Computer Science 2026-01-22 Yuki Kadokawa , Jonas Frey , Takahiro Miki , Takamitsu Matsubara , Marco Hutter

Human-designed reward functions for reinforcement learning (RL) agents are frequently misaligned with the humans' true, unobservable objectives, and thus act only as proxies. Optimizing for a misspecified proxy reward function often induces…

Artificial Intelligence · Computer Science 2026-01-30 Stephane Hatgis-Kessell , Logan Mondal Bhamidipaty , Emma Brunskill

Learning from human involvement aims to incorporate the human subject to monitor and correct agent behavior errors. Although most interactive imitation learning methods focus on correcting the agent's action at the current state, they do…

Machine Learning · Computer Science 2025-10-17 Haoyuan Cai , Zhenghao Peng , Bolei Zhou

Preference-based Reinforcement Learning (PbRL) methods provide a solution to avoid reward engineering by learning reward models based on human preferences. However, poor feedback- and sample- efficiency still remain the problems that hinder…

Robotics · Computer Science 2026-05-22 Hexian Ni , Tao Lu , Haoyuan Hu , Yinghao Cai , Shuo Wang

Preference based Reinforcement Learning (PbRL) removes the need to hand specify a reward function by learning a reward from preference feedback over policy behaviors. Current approaches to PbRL do not address the credit assignment problem…

Machine Learning · Computer Science 2024-04-16 Mudit Verma , Katherine Metcalf

Preference-based reinforcement learning (PbRL) shows promise in aligning robot behaviors with human preferences, but its success depends heavily on the accurate modeling of human preferences through reward models. Most methods adopt…

Robotics · Computer Science 2025-03-12 Dezhong Zhao , Ruiqi Wang , Dayoon Suh , Taehyeon Kim , Ziqin Yuan , Byung-Cheol Min , Guohua Chen

In the evolving landscape of human-centric systems, personalized privacy solutions are becoming increasingly crucial due to the dynamic nature of human interactions. Traditional static privacy models often fail to meet the diverse and…

Machine Learning · Computer Science 2024-11-14 Mojtaba Taherisadr , Salma Elmalaki

Preference-based Reinforcement Learning (PbRL) has made significant strides in single-agent settings, but has not been studied for multi-agent frameworks. On the other hand, modeling cooperation between multiple agents, specifically,…

Artificial Intelligence · Computer Science 2024-09-26 Siddhant Bhambri , Mudit Verma , Upasana Biswas , Anil Murthy , Subbarao Kambhampati
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