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arXiv 2104.14725stat.AP
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线性混合效应模型的贝叶斯信息准则

Bayesian Information Criterion for Linear Mixed-effects Models

Nan Shen, Bárbara González

摘要:

在模型选择过程中使用贝叶斯信息准则(BIC)是在假设观测值独立同分布(i.i.d.)的情况下进行的。然而,在实践中,我们并不总是有i.i.d.。样品例如,在同一组内,聚类观察往往更相似,而纵向数据是通过重复测量同一对象来收集的。在这些场景中,BIC中的假设不被满足。提出了有效样本量的概念,用有效样本量代替了原BIC表达式中的样本量,定义了改进的BIC,为混合效应模型的研究提供了更好的理论基础。最后给出了数值实验结果,并与目前广泛使用的BIC进行了性能比较。

英文摘要:

The use of Bayesian information criterion (BIC) in the model selection procedure is under the assumption that the observations are independent and identically distributed (i.i.d.). However, in practice, we do not always have i.i.d. samples. For example, clustered observations tend to be more similar within the same group, and longitudinal data is collected by measuring the same subject repeatedly. In these scenarios, the assumption in BIC is not satisfied. The concept of effective sample size is brought up and improved BIC is defined by replacing the sample size in the original BIC expression with the effective sample size, which will give us a better theoretical foundation in the circumstance that mixed-effects models involve. Numerical experiment results are also given by comparing the performance of our new BIC with other widely used BICs.

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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