Course Concept Expansion in MOOCs with External Knowledge and Interactive Game

Jifan Yu, Chenyu Wang, Gan Luo, Lei Hou, Juanzi Li, Zhiyuan Liu, Jie Tang


Abstract
As Massive Open Online Courses (MOOCs) become increasingly popular, it is promising to automatically provide extracurricular knowledge for MOOC users. Suffering from semantic drifts and lack of knowledge guidance, existing methods can not effectively expand course concepts in complex MOOC environments. In this paper, we first build a novel boundary during searching for new concepts via external knowledge base and then utilize heterogeneous features to verify the high-quality results. In addition, to involve human efforts in our model, we design an interactive optimization mechanism based on a game. Our experiments on the four datasets from Coursera and XuetangX show that the proposed method achieves significant improvements(+0.19 by MAP) over existing methods.
Anthology ID:
P19-1421
Volume:
Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics
Month:
July
Year:
2019
Address:
Florence, Italy
Editors:
Anna Korhonen, David Traum, Lluís Màrquez
Venue:
ACL
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
4292–4302
Language:
URL:
https://aclanthology.org/P19-1421
DOI:
10.18653/v1/P19-1421
Bibkey:
Cite (ACL):
Jifan Yu, Chenyu Wang, Gan Luo, Lei Hou, Juanzi Li, Zhiyuan Liu, and Jie Tang. 2019. Course Concept Expansion in MOOCs with External Knowledge and Interactive Game. In Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics, pages 4292–4302, Florence, Italy. Association for Computational Linguistics.
Cite (Informal):
Course Concept Expansion in MOOCs with External Knowledge and Interactive Game (Yu et al., ACL 2019)
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PDF:
https://aclanthology.org/P19-1421.pdf
Video:
 https://aclanthology.org/P19-1421.mp4