Linked Life Data

19663993

Source:http://linkedlifedata.com/resource/pubmed/id/19663993

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
12
pubmed:dateCreated
2009-11-25
pubmed:abstractText
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.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
1558-5646
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
63
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3258-68
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Size-correction and principal components for interspecific comparative studies.
pubmed:affiliation
Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, Massachusetts 02138, USA. lrevell@nescent.org
pubmed:publicationType
Journal Article, Comparative Study