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Spoken grammar practice and feedback in an ASR-based CALL system

机译：基于ASR的CALL系统中的口语语法练习和反馈

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摘要

Speaking practice is important for learners of a second language. Computer assisted language learning (CALL) systems can provide attractive opportunities for speaking practice when combined with automatic speech recognition (ASR) technology. In this paper, we present a CALL system that offers spoken practice of word order, an important aspect of Dutch grammar. The system uses ASR technology to process the learner's responses and to detect errors so that immediate corrective feedback (CF) can be provided on learner errors. We evaluate the system as a learning environment by analyzing proficiency gains in pre- and post-tests, the logs of the practice sessions, and the learners' appreciation of the system. In this paper, we present two learning conditions: (1) the learners received oral practice and immediate CF on spoken performance and (2) learners received oral practice and NO CF on spoken performance. We found that our system was successful in providing L2 speaking practice. Results show that both groups improve their proficiency on the target feature as a result of treatment. Between the groups there is no significant difference in learning, but the groups proceeded differently through the sessions, and the learners in the group that received automatic CF evaluated the system more positively than the NO CF group. We discuss the performance of the system as an environment for language learning and the obtained proficiency test results, and relate them to current views on second language acquisition.
机译：口语练习对第二语言的学习者很重要。与自动语音识别（ASR）技术结合使用时，计算机辅助语言学习（CALL）系统可以为口语练习提供诱人的机会。在本文中，我们介绍了一个CALL系统，该系统提供荷兰语语法的重要方面，即单词顺序的口语练习。该系统使用ASR技术来处理学习者的响应并检测错误，以便可以针对学习者的错误提供即时的纠正反馈（CF）。我们通过分析测试前和测试后的熟练程度，练习记录以及学习者对系统的欣赏，将系统评估为学习环境。在本文中，我们提出了两种学习条件：（1）学习者接受口语练习和即时的口语能力CF；（2）学习者接受口语练习和无口语能力。我们发现我们的系统成功地提供了二语口语练习。结果表明，两组均通过治疗提高了对目标特征的熟练程度。各组之间的学习没有显着差异，但是各组的学习过程有所不同，并且接受自动CF的组中的学习者对系统的评价比NO CF组更积极。我们讨论了该系统作为语言学习环境的性能以及所获得的能力测试结果，并将它们与第二语言习得的当前观点联系起来。

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