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arXiv 2409.15979cs.CL
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面向比较评估任务的LLMs微调

Finetuning LLMs for Comparative Assessment Tasks

ALTA Institute, University of Cambridge(剑桥大学ALTA研究所)

Vatsal Raina, Adian Liusie, Mark Gales

AI总结:

本文提出一个面向比较评估任务的LLMs微调框架,通过在软概率上训练使模型输出与目标分布对齐,在保持高效子集比较性能的同时提升了最先进水平。

摘要:

自然语言生成中的自动评估是一项具有挑战性的任务。指令微调的大型语言模型(LLMs)在无参考评估中展现了潜力,特别是通过比较评估。然而,成对比较的二次计算复杂度限制了其可扩展性。为解决这一问题,已有研究通过在零样本LLMs概率上应用比较策略来探索高效的比较评估。我们提出了一个用于比较评估的LLMs微调框架,以使模型输出与比较概率的目标分布对齐。通过在软概率上进行训练,我们的方法在仅使用高效比较子集时仍保持高性能的同时,提升了最先进的性能。

英文摘要:

Automated assessment in natural language generation is a challenging task. Instruction-tuned large language models (LLMs) have shown promise in reference-free evaluation, particularly through comparative assessment. However, the quadratic computational complexity of pairwise comparisons limits its scalability. To address this, efficient comparative assessment has been explored by applying comparative strategies on zero-shot LLM probabilities. We propose a framework for finetuning LLMs for comparative assessment to align the model's output with the target distribution of comparative probabilities. By training on soft probabilities, our approach improves state-of-the-art performance while maintaining high performance with an efficient subset of comparisons.

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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