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arXiv 2012.04056cs.CLcs.AI
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机器阅读理解中的语义改变修正

Semantics Altering Modifications for Evaluating Comprehension in Machine Reading

University of Manchester(曼彻斯特大学)

Viktor Schlegel, Goran Nenadic, Riza Batista-Navarro

摘要:

NLP的进步已经为机器阅读理解(MRC)任务带来了令人印象深刻的结果,据报道,这些方法可以实现与人类相当的性能。在本文中,我们研究了最先进的MRC模型是否能够正确处理语义改变修改(SAM):语言动机的现象,改变句子的语义,同时保留大部分的词汇表面形式。我们提出了一种方法来自动生成和调整挑战集具有原始和修改的例子。我们进一步提出了一种新的评估方法,正确评估MRC系统处理这些例子的能力,独立于它们被优化的数据,通过对域转移引入的影响进行折扣。在一个大规模的实证研究中,我们应用的方法,以评估提取MRC模型的能力,正确处理SAM丰富的数据。我们全面涵盖了12种不同的最先进的神经架构配置和四个训练数据集,并发现-尽管它们具有众所周知的卓越性能-优化模型始终难以正确处理语义改变的数据。

英文摘要:

Advances in NLP have yielded impressive results for the task of machine reading comprehension (MRC), with approaches having been reported to achieve performance comparable to that of humans. In this paper, we investigate whether state-of-the-art MRC models are able to correctly process Semantics Altering Modifications (SAM): linguistically-motivated phenomena that alter the semantics of a sentence while preserving most of its lexical surface form. We present a method to automatically generate and align challenge sets featuring original and altered examples. We further propose a novel evaluation methodology to correctly assess the capability of MRC systems to process these examples independent of the data they were optimised on, by discounting for effects introduced by domain shift. In a large-scale empirical study, we apply the methodology in order to evaluate extractive MRC models with regard to their capability to correctly process SAM-enriched data. We comprehensively cover 12 different state-of-the-art neural architecture configurations and four training datasets and find that -- despite their well-known remarkable performance -- optimised models consistently struggle to correctly process semantically altered data.

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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