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	Item Response Theory Based Ensemble in Machine Learning
	Ziheng Chen; Hongshik Ahn
刊名	International Journal of Automation and Computing
	2020
卷号	17期号:5页码:621-636
关键词	Classification ensemble learning item response theory machine learning expectation maximization (EM) algorithm.
ISSN号	1476-8186
DOI	10.1007/s11633-020-1239-y
英文摘要	In this article, we propose a novel probabilistic framework to improve the accuracy of a weighted majority voting algorithm. In order to assign higher weights to the classifiers which can correctly classify hard-to-classify instances, we introduce the item response theory (IRT) framework to evaluate the samples′ difficulty and classifiers′ ability simultaneously. We assigned the weights to classifiers based on their abilities. Three models are created with different assumptions suitable for different cases. When making an inference, we keep a balance between the accuracy and complexity. In our experiment, all the base models are constructed by single trees via bootstrap. To explain the models, we illustrate how the IRT ensemble model constructs the classifying boundary. We also compare their performance with other widely used methods and show that our model performs well on 19 datasets.
内容类型	期刊论文
源URL	[http://ir.ia.ac.cn/handle/173211/42263]
专题	自动化研究所_学术期刊_International Journal of Automation and Computing
作者单位	Department of Applied Mathematics and Statistics, Stony Brook University, New York 11794−3600, USA
推荐引用方式 GB/T 7714	Ziheng Chen,Hongshik Ahn. Item Response Theory Based Ensemble in Machine Learning[J]. International Journal of Automation and Computing,2020,17(5):621-636.
APA	Ziheng Chen,&Hongshik Ahn.(2020).Item Response Theory Based Ensemble in Machine Learning.International Journal of Automation and Computing,17(5),621-636.
MLA	Ziheng Chen,et al."Item Response Theory Based Ensemble in Machine Learning".International Journal of Automation and Computing 17.5(2020):621-636.

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