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Tai-Wei Chang

3 accepted papers

2025

Learning Causal Transition Matrix for Instance-dependent Label Noise

AAAI 2025technical

Noisy labels are both inevitable and problematic in machine learning methods, as they negatively impact models' generalization ability by causing overfitting. In the context of learning with noise, the transition matrix plays a crucial role in the design of statistically consistent algorithms. Howev…

Cited by 0SourcePDFScholar
2025

RED: Unleashing Token-Level Rewards from Holistic Feedback via Reward Redistribution

EMNLP 2025

Reinforcement learning from human feedback (RLHF) offers a promising approach to aligning large language models (LLMs) with human preferences. Typically, a reward model is trained or supplied to act as a proxy for humans in evaluating generated responses during the reinforcement training phase. Howe

2024

Optimizing Language Models with Fair and Stable Reward Composition in Reinforcement Learning

EMNLP 2024main

Reinforcement learning from human feedback (RLHF) and AI-generated feedback (RLAIF) have become prominent techniques that significantly enhance the functionality of pre-trained language models (LMs). These methods harness feedback, sourced either from humans or AI, as direct rewards or to shape rewa…