The paper generalizes Bradley-Terry reward modeling to ordinal feedback labels and proves that, under a marginal unbiasedness assumption, finer-grained labels reduce Rademacher complexity and can improve reward learning.
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Reward Modeling with Ordinal Feedback: Wisdom of the Crowd
The paper generalizes Bradley-Terry reward modeling to ordinal feedback labels and proves that, under a marginal unbiasedness assumption, finer-grained labels reduce Rademacher complexity and can improve reward learning.