Comment on inaccuracies in Bayesian model averaging and statistical support for polysynthetic languages.
We identify major flaws in the statistical analysis of Bromham et al. (2025), whose claims about polysynthesis and phylogenetic isolation rely on incorrect implementations of Bayesian model averaging and spatial filtering. Reanalysis using appropriate methods shows that key predictors lose statistical support.
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Koplenig et al. (2025) studied this question.
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