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arXiv 2411.04424cs.CLcs.AI
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使用 LLM 评估器进行胜率估计的贝叶斯校准

Bayesian Calibration of Win Rate Estimation with LLM Evaluators

Yale University(耶鲁大学)

Yicheng Gao, Gonghan Xu, Zhe Wang, Arman Cohan

AI总结:

针对 LLM 评估器内在偏差导致胜率估计不可靠的问题,提出 BWRS 和 Bayesian Dawid-Skene 两种贝叶斯校准方法,在六个数据集上验证有效提升了生成式语言模型真实胜率估计的准确性。

摘要:

大型语言模型(LLMs)的最新进展显示出将 LLMs 用作评估器以评估 LLMs 生成文本质量的潜力。然而,由于 LLM 评估器内在的胜率估计偏差,直接应用 LLM 评估器比较或评判不同系统会导致不可靠的结果。为了缓解此问题,我们提出了两种校准方法:贝叶斯胜率采样(BWRS)和贝叶斯 Dawid-Skene,两者均利用贝叶斯推断更准确地推断生成式语言模型的真实胜率。我们在涵盖故事生成、摘要和指令遵循任务的六个数据集上实证验证了这些方法。结果表明,这两种方法均能有效提升使用 LLMs 作为评估器时的胜率估计准确性,为可靠的自动文本质量评估提供了有前景的方向。

英文摘要:

Recent advances in large language models (LLMs) show the potential of using LLMs as evaluators for assessing the quality of text generations from LLMs. However, applying LLM evaluators naively to compare or judge between different systems can lead to unreliable results due to the intrinsic win rate estimation bias of LLM evaluators. In order to mitigate this problem, we propose two calibration methods, Bayesian Win Rate Sampling (BWRS) and Bayesian Dawid-Skene, both of which leverage Bayesian inference to more accurately infer the true win rate of generative language models. We empirically validate our methods on six datasets covering story generation, summarization, and instruction following tasks. We show that both our methods are effective in improving the accuracy of win rate estimation using LLMs as evaluators, offering a promising direction for reliable automatic text quality evaluation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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