SIZE-CORRECTION AND PRINCIPAL COMPONENTS FOR INTERSPECIFIC COMPARATIVE STUDIES

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ID: 303842
2009
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Abstract
Phylogenetic methods for the analysis of species data are widely used in evolutionary studies. However, preliminary data transformations and data reduction procedures (such as a size‐correction and principal components analysis, PCA) are often performed without first correcting for nonindependence among the observations for species. In the present short comment and attached R and MATLAB code, I provide an overview of statistically correct procedures for phylogenetic size‐correction and PCA. I also show that ignoring phylogeny in preliminary transformations can result in significantly elevated variance and type I error in our statistical estimators, even if subsequent analysis of the transformed data is performed using phylogenetic methods. This means that ignoring phylogeny during preliminary data transformations can possibly lead to spurious results in phylogenetic statistical analyses of species data.
Reference Key
openalex_W2099020314 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Liam J. Revell
Journal international journal of systematic and evolutionary microbiology
Year 2009
DOI
10.1111/j.1558-5646.2009.00804.x
URL
https://doi.org/10.1111/j.1558-5646.2009.00804.x
Keywords Keywords not found

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