- 著者
- Kazuaki Hanawa Ryo Nagata Kentaro Inui
- 出版者
- The Association for Natural Language Processing
- 雑誌
- 自然言語処理 (ISSN:13407619)
- 巻号頁・発行日
- vol.29, no.3, pp.901-924, 2022 (Released:2022-09-15)
- 参考文献数
- 26
Feedback comment generation is the task of generating explanatory notes for language learners. Although various generation techniques are available, little is known about which methods are appropriate for this task. Nagata (2019) demonstrates the effectiveness of neural-retrieval-based methods in generating feedback comments for preposition use. Retrieval-based methods have limitations in that they can only output feedback comments existing in the given training data. Besides, feedback comments can be made on other grammatical and writing items other than preposition use, which has not yet been addressed. To shed light on these points, we investigate a wider range of methods for generating various types of feedback comments in this study. Our close analysis of the features of the task leads us to investigate three different architectures for comment generation: (i) a neural-retrieval-based method as a baseline, (ii) a pointer-generator-based generation method as a neural seq2seq method, (iii) a retrieve-and-edit method, a hybrid of (i) and (ii). Intuitively, the pointer-generator should outperform neural-retrieval, and retrieve-and-edit should perform the best. However, in our experiments, this expectation is completely overturned. We closely analyze the results to reveal the major causes of these counter-intuitive results and report on our findings from the experiments, which will lead to further developments of feedback comment generation.
- 著者
- 北村 達也 永田 亮 船越 孝太郎 Tatsuya Kitamura Ryo Nagata Kotaro Funakoshi
- 出版者
- 甲南大学知能情報学部
- 雑誌
- 甲南大学紀要. 知能情報学編 = Memoirs of Konan University. Intelligence & Informatics Series (ISSN:18830161)
- 巻号頁・発行日
- vol.11, no.1, pp.1-17, 2018-07-31
This study proposed and evaluated an audio-visual teaching aid for teaching rhythm of spoken English. The teaching aid instructs stress timing of English by movements of a circle marker on PC screen. Native Japanese participants exercised English sentences with and without the teaching aid and their speech sounds were recorded before and after the exercise. The results of analyses of the speech sounds showed that the teaching aid could improve in learning the English stress timing.