Runs hierarchical linear Bayesian models. Samples from the posterior
distributions of model parameters in JAGS (Just Another Gibbs Sampler;
Plummer, 2017, < http://mcmc-jags.sourceforge.net>). Computes Bayes factors for group
parameters of interest with the Savage-Dickey density ratio (Wetzels,
Raaijmakers, Jakab, Wagenmakers, 2009,