Maximizing the efficiency of human feedback in AI alignment: a comparative analysis
This work addresses the problem of reducing human workload while maintaining alignment quality in AI alignment pipelines, representing an incremental improvement over existing methods.
The paper tackled the inefficiency of random pair sampling in Reinforcement Learning from Human Feedback (RLHF) by proposing alternative sampling and evaluation strategies, with Swiss InfoGain significantly outperforming other methods under constrained annotation budgets and showing improvements even in high-resource settings.
Reinforcement Learning from Human Feedback (RLHF) relies on preference modeling to align machine learning systems with human values, yet the popular approach of random pair sampling with Bradley-Terry modeling is statistically limited and inefficient under constrained annotation budgets. In this work, we explore alternative sampling and evaluation strategies for preference inference in RLHF, drawing inspiration from areas such as game theory, statistics, and social choice theory. Our best-performing method, Swiss InfoGain, employs a Swiss tournament system with a proxy mutual-information-gain pairing rule, which significantly outperforms all other methods in constrained annotation budgets while also being more sample-efficient. Even in high-resource settings, we can identify superior alternatives to the Bradley-Terry baseline. Our experiments demonstrate that adaptive, resource-aware strategies reduce redundancy, enhance robustness, and yield statistically significant improvements in preference learning, highlighting the importance of balancing alignment quality with human workload in RLHF pipelines.