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教育评估中的贝叶斯网:数字从何而来?

Bayes Nets in Educational Assessment: Where Do the Numbers Come From?

Educational Testing Service(教育考试服务中心)

Robert Mislevy, Russell Almond, Duanli Yan, Linda S. Steinberg

摘要:

随着观察和学生模型变得复杂,利用技术和认知心理学进步的教育评估可以超越熟悉的测试模型和分析方法。在评估设计的门户概念框架内,贝叶斯推理网络(BINs)根据学生的言行记录了他们对知识和技能的信念。加入证据模型BIN片段-其中包含可观察变量和指向学生模型变量的指针-到学生模型允许人们在观察到达时更新关于知识和技能的信念。马尔可夫链蒙特卡罗(MCMC)技术可以从经验数据中估计所需的条件概率,并辅以专家判断或实质性理论。项目反应理论(IRT)和多变量潜在类建模的特殊情况下的细节,后者的一个数值例子。

英文摘要:

As observations and student models become complex, educational assessments that exploit advances in technology and cognitive psychology can outstrip familiar testing models and analytic methods. Within the Portal conceptual framework for assessment design, Bayesian inference networks (BINs) record beliefs about students' knowledge and skills, in light of what they say and do. Joining evidence model BIN fragments- which contain observable variables and pointers to student model variables - to the student model allows one to update belief about knowledge and skills as observations arrive. Markov Chain Monte Carlo (MCMC) techniques can estimate the required conditional probabilities from empirical data, supplemented by expert judgment or substantive theory. Details for the special cases of item response theory (IRT) and multivariate latent class modeling are given, with a numerical example of the latter.

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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