Journal
MULTIVARIATE BEHAVIORAL RESEARCH
Volume 56, Issue 6, Pages 920-940Publisher
ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
DOI: 10.1080/00273171.2020.1778439
Keywords
Bayesian model averaging; model selection; multilevel modeling; Bayesian estimation
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The study found that Bayesian model averaging (BMA) is a reliable alternative to traditional model comparison and selection methods. The simulation study demonstrated that BMA can effectively compare and select models through both Bayesian and frequentist frameworks.
We investigated the Bayesian model averaging (BMA) technique as an alternative method to the traditional model selection approaches for multilevel models (MLMs). BMA synthesizes the information derived from all possible models and comes up with a weighted estimate. A simulation study compared BMA with additional modeling techniques, including the single best model approach, Bayesian MLM using informative, diffuse, and inaccurate priors, and restricted maximum likelihood. A two-level random intercept and random slope model was examined with these modeling techniques. Generated data used two types of true models: a full MLM and a reduced MLM. Findings of the simulation study suggested that BMA was a trustworthy alternative to traditional model comparison and selection approaches through the Bayesian and the frequentist frameworks. We also include an empirical example highlighting the extension of MLMs into the BMA framework, as well as model interpretation.
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