Tense and Aspect Error Correction for ESL Learners Using Global Context
Tense and Aspect Error Correction for ESL Learners Using Global Context
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发表时间：
2012-07
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通讯作者：
Toshikazu Tajiri;Mamoru Komachi;Yuji Matsumoto
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作者：
Toshikazu Tajiri;Mamoru Komachi;Yuji Matsumoto
随着英语学习者数量的不断增长，ESL学习者写作的自动纠错成为一个日益活跃的研究领域。然而，大多数研究主要集中在冠词和介词的错误上，尽管时态/体错误也很重要。时态/体纠错困难的主要原因之一是时态/体的选择高度依赖于全局上下文。以往的语法纠错研究通常采用逐点预测，对每个单词独立进行分类，因此无法捕获相邻标签的信息。为了考虑全局信息，我们将任务视为序列标记：文档中的每个动词短语根据周围的标签用时态/体进行标记。我们的实验表明，全局上下文对时态/体错误纠正有适度的贡献。
As the number of learners of English is constantly growing, automatic error correction of ESL learners' writing is an increasingly active area of research. However, most research has mainly focused on errors concerning articles and prepositions even though tense/aspect errors are also important. One of the main reasons why tense/aspect error correction is difficult is that the choice of tense/aspect is highly dependent on global context. Previous research on grammatical error correction typically uses pointwise prediction that performs classification on each word independently, and thus fails to capture the information of neighboring labels. In order to take global information into account, we regard the task as sequence labeling: each verb phrase in a document is labeled with tense/aspect depending on surrounding labels. Our experiments show that the global context makes a moderate contribution to tense/aspect error correction.