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English(EN) Evaluation Pitfalls and Sparsity Limitations in LLM-based Confidence Estimates for Classification

LLM 置信度估计在分类任务中存在稀疏性问题,影响评估效果

一篇新论文指出了大型语言模型(LLM)在分类任务中估计置信度时存在的重大局限性。研究人员发现,常见的诸如语言化(verbalization)等方法会导致置信度输出高度稀疏,模型通常只产生少数几个不同的置信度值。这种稀疏性严重影响了准确率-拒绝曲线下面积(AUARC)等评估指标,因为不同的插值方法可能导致模型排名发生巨大变化。该论文提出了一种新方法,“语言化对数概率”(verbalization logprobs),该方法通过词元(token)概率对语言化数字进行加权,以解决稀疏性问题并提高 AUARC 分数,同时不增加推理成本。 AI

影响 强调了 LLM 分类置信度评估中的关键挑战,可能影响模型性能的评估和比较方式。

排序理由 论文详细介绍了评估陷阱并提出了一种新的 LLM 置信度估计方法。[lever_c_demoted from research: ic=1 ai=1.0]

在 Hugging Face Daily Papers 阅读 →

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LLM 置信度估计在分类任务中存在稀疏性问题,影响评估效果

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论文详细介绍了评估陷阱并提出了一种新的 LLM 置信度估计方法。[lever_c_demoted from research: ic=1 ai=1.0]
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报道来源 [1]

  1. Hugging Face Daily Papers TIER_1 English(EN) ·

    LLM-based置信度估计分类的评估陷阱与稀疏性限制

    Confidence estimation is essential when LLMs are used for classification, indicating when predictions can be trusted. However, common approaches such as verbalization produce extremely sparse outputs. For instance, Qwen3-32B verbalizes only eight unique confidence values on SST-2…