Abstract
The aim of the current study is to propose a model, which can automatically grade difficulty for a question from “instruction system” question bank. The system mainly uses 4 attributes with 26 features based on principal component analysis, which are employed to be input of the Automatically Difficulty Grading Model (ADGM). A knowledge tree model and a machine learning algorithm are utilized as important parts for the classification module. The experimental dataset “instruction system” question bank is based on our built “Principles of Computer Organization” online education system, the accuracy result of difficulty classification could be 77.43% which is much higher than the accuracy of random guess 50%.
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Acknowledgments
The authors would like to thank Master Weilai Liu for providing the help of the ADGM model. The authors would also like to thank the anonymous referees for their valuable comments and helpful suggestions. The work is supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China award (No. 20130031120028), Research Plan in Application Foundation and Advanced Technologies in Tianjin award (No. 14JCQNJC00700), Open Project of the State Key Laboratory of Computer Architecture, Institute of Computing Technology, Chinese Academy of Sciences award under Grant No. CARCH201604.
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Zhang, J., Liu, C., Yang, H., Feng, F., Gong, X. (2017). Automatically Difficulty Grading Method Based on Knowledge Tree. In: Li, G., Ge, Y., Zhang, Z., Jin, Z., Blumenstein, M. (eds) Knowledge Science, Engineering and Management. KSEM 2017. Lecture Notes in Computer Science(), vol 10412. Springer, Cham. https://doi.org/10.1007/978-3-319-63558-3_38
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