arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2002.00276cs.LGstat.ML
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变项反应理论:快速、准确、表达性强

Variational Item Response Theory: Fast, Accurate, and Expressive

Stanford University(斯坦福大学)

Mike Wu, Richard L. Davis, Benjamin W. Domingue, Chris Piech, Noah Goodman

摘要:

项目反应理论(IRT)是一种基于人类对问题的反应来理解人类的普遍模型,用于教育,医学和心理学等领域。大型现代数据集提供了捕捉人类行为中更多细微差别的机会,可能会提高考试成绩,并更好地为公共政策提供信息。然而,更大的数据集提出了一个困难的速度/准确性的挑战,当代算法拟合IRT模型。我们介绍了一个变分贝叶斯推理算法的IRT,并表明它是快速和可扩展的,而不牺牲精度。使用这种推理方法,然后我们扩展经典的IRT表达贝叶斯模型的反应。将此方法应用于来自认知科学和教育的五个大规模项目反应数据集,产生了更高的对数似然和缺失数据的插补改进。算法实现是开源的,易于使用。

英文摘要:

Item Response Theory (IRT) is a ubiquitous model for understanding humans based on their responses to questions, used in fields as diverse as education, medicine and psychology. Large modern datasets offer opportunities to capture more nuances in human behavior, potentially improving test scoring and better informing public policy. Yet larger datasets pose a difficult speed / accuracy challenge to contemporary algorithms for fitting IRT models. We introduce a variational Bayesian inference algorithm for IRT, and show that it is fast and scaleable without sacrificing accuracy. Using this inference approach we then extend classic IRT with expressive Bayesian models of responses. Applying this method to five large-scale item response datasets from cognitive science and education yields higher log likelihoods and improvements in imputing missing data. The algorithm implementation is open-source, and easily usable.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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