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In-Context Reward Adaptation

techniqueactiveprovisionalin-context-reward-adaptation-44407f1e·1 events·first seen 19d ago

Aliases: In-Context Reward Adaptation

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6arXiv · cs.LG·19d ago·source ↗

In-Context Reward Adaptation for Robust Preference Modeling

This paper proposes In-Context Reward Adaptation (ICRA), a transformer-based framework that infers reward structures from small sets of preference demonstrations at inference time, without retraining. The key finding is that standard transformers exhibit asymptotic bias toward ground-truth rewards, but incorporating human response time as an auxiliary signal resolves this limitation and enables generalization to unseen preference domains. The approach addresses a core limitation of static RLHF reward models, which fail to handle heterogeneous or shifting human value distributions.