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A Simple Method for Comparing Complex Models: Bayesian Model Comparison for Hierarchical Multinomial Processing Tree Models Using Warp-III Bridge Sampling

机译:比较复杂模型的简单方法:使用Warp-III桥采样的多层多项式处理树模型的贝叶斯模型比较

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摘要

Multinomial processing trees (MPTs) are a popular class of cognitive models for categorical data. Typically, researchers compare several MPTs, each equipped with many parameters, especially when the models are implemented in a hierarchical framework. A Bayesian solution is to compute posterior model probabilities and Bayes factors. Both quantities, however, rely on the marginal likelihood, a high-dimensional integral that cannot be evaluated analytically. In this case study, we show how Warp-III bridge sampling can be used to compute the marginal likelihood for hierarchical MPTs. We illustrate the procedure with two published data sets and demonstrate how Warp-III facilitates Bayesian model averaging.Electronic supplementary materialThe online version of this article (10.1007/s11336-018-9648-3) contains supplementary material, which is available to authorized users.
机译:多项式处理树(MPT)是一类用于分类数据的流行认知模型。通常,研究人员比较几个MPT,每个MPT都配备许多参数,尤其是在分层框架中实施模型时。贝叶斯解决方案是计算后验模型概率和贝叶斯因子。但是,这两个量都依赖于边际可能性,即无法通过分析来评估的高维积分。在本案例研究中,我们展示了如何使用Warp-III桥采样来计算分层MPT的边际可能性。我们用两个已公开的数据集说明了该过程,并演示了Warp-III如何促进贝叶斯模型平均。电子补充材料本文的在线版本(10.1007 / s11336-018-9648-3)包含补充材料,可供授权用户使用。

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