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arXiv 2406.13397cs.CL
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MoreHopQA:不止于多跳推理

MoreHopQA: More Than Multi-hop Reasoning

National Institute of Informatics(情报学研究所);Nantes Université(南特大学);The Graduate University for Advanced Studies(高级研究大学院大学);The University of Tokyo(东京大学);EPFL(洛桑联邦理工学院)

Julian Schnitzler, Xanh Ho, Jiahao Huang, Florian Boudin, Saku Sugawara, Akiko Aizawa

AI总结:

针对现有多跳数据集多为抽取式、易让模型走捷径的问题,研究者构建了生成式多跳推理数据集MoreHopQA,新增三类推理维度,评估发现主流大模型在该数据集上推理表现有待提升。

摘要:

现有的大多数多跳数据集都是抽取式答案数据集,这类数据集中问题的答案可以直接从给定的上下文中提取出来。这往往会导致模型使用启发式方法或捷径,而非执行真正的多跳推理。本文提出了一个全新的多跳数据集MoreHopQA,该数据集将答案形式从抽取式转向生成式。\n我们的数据集基于三个已有的多跳数据集构建:HotpotQA、2WikiMultihopQA和MuSiQue。我们没有仅依赖事实推理,而是通过增加另一层提问来拓展现有的多跳问题,新增的推理涉及以下一种、两种或全部三种类型:常识推理、算术推理和符号推理。该数据集通过半自动化流程构建,最终得到1118个经过人工验证的样本。\n随后我们使用该数据集评估了五种不同的大语言模型:Mistral 7B、Gemma 7B、Llama 3(8B和70B)以及GPT-4。我们还设计了多种案例来分析问答过程中的推理步骤。结果表明,模型在初始多跳问题上表现良好,但在我们的拓展问题上表现不佳,说明该数据集比以往的数据集更具挑战性。我们对问题分解的分析显示,尽管模型能够正确回答问题,但只有一部分模型能实现完美推理(即所有对应子问题都回答正确),其中GPT-4的完美推理占比为38.7%,Llama3-70B为33.4%。评估代码和数据可在https://github.com/Alab-NII/morehopqa 获取。

英文摘要:

Most existing multi-hop datasets are extractive answer datasets, where the answers to the questions can be extracted directly from the provided context. This often leads models to use heuristics or shortcuts instead of performing true multi-hop reasoning. In this paper, we propose a new multi-hop dataset, MoreHopQA, which shifts from extractive to generative answers. Our dataset is created by utilizing three existing multi-hop datasets: HotpotQA, 2WikiMultihopQA, and MuSiQue. Instead of relying solely on factual reasoning, we enhance the existing multi-hop questions by adding another layer of questioning that involves one, two, or all three of the following types of reasoning: commonsense, arithmetic, and symbolic. Our dataset is created through a semi-automated process, resulting in a dataset with 1,118 samples that have undergone human verification. We then use our dataset to evaluate five different large language models: Mistral 7B, Gemma 7B, Llama 3 (8B and 70B), and GPT-4. We also design various cases to analyze the reasoning steps in the question-answering process. Our results show that models perform well on initial multi-hop questions but struggle with our extended questions, indicating that our dataset is more challenging than previous ones. Our analysis of question decomposition reveals that although models can correctly answer questions, only a portion - 38.7% for GPT-4 and 33.4% for Llama3-70B - achieve perfect reasoning, where all corresponding sub-questions are answered correctly. Evaluation code and data are available at https://github.com/Alab-NII/morehopqa

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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