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arXiv 1906.07580cs.CL
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第二语言学习者语篇可读性评估

Text Readability Assessment for Second Language Learners

The ALTA Institute(阿尔塔研究所);University of Cambridge(剑桥大学)

Menglin Xia, Ekaterina Kochmar, Ted Briscoe

摘要:

本文旨在探讨针对第二语言学习者的文本可读性评估问题。在这项任务中的主要挑战之一是缺乏显着规模的水平注释的数据。在本研究中,我们收集了一个CEFR评分的文本数据集,为英语学习者量身定制作为一个L2和调查文本可读性评估为母语和L2学习者。我们采用泛化方法来适应在较大的母语语料库上训练的模型来估计学习者的文本可读性,并探索领域自适应和自学习技术来利用母语数据来提高系统在有限的第二语言数据上的性能。在我们的实验中,学习者文本可读性的最佳表现模型达到了0.797的准确率和$0.938$的PCC。

英文摘要:

This paper addresses the task of readability assessment for the texts aimed at second language (L2) learners. One of the major challenges in this task is the lack of significantly sized level-annotated data. For the present work, we collected a dataset of CEFR-graded texts tailored for learners of English as an L2 and investigated text readability assessment for both native and L2 learners. We applied a generalization method to adapt models trained on larger native corpora to estimate text readability for learners, and explored domain adaptation and self-learning techniques to make use of the native data to improve system performance on the limited L2 data. In our experiments, the best performing model for readability on learner texts achieves an accuracy of 0.797 and PCC of $0.938$.

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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