[Taxacom] Methodological plurality [was cladistic analysis for morphological characters -- UPGMA is not cladistics]

David Campbell pleuronaia at gmail.com
Mon Nov 19 10:00:27 CST 2012


> Congruence or conflict across methods tells us little or nothing about
> clade support.

Although congruence across methods is not that surprising when using
the same data set, conflict does indicate that the perceived support
is method-sensitive.  Perhaps it's weak support; perhaps there is an
issue with the different analysis techniques that highlight
discrepancies in the data.  But there's good reason for caution about
basing grand conclusions about results that are supported by one line
of evidence (whether an analysis technique, a data set, whatever) and
contradicted by another; conversely, if the same result pops out time
after time, that's more convincing.

-- 
Dr. David Campbell
Visiting Professor
Department of Natural Sciences
Gardner-Webb University
Boiling Springs NC 28017




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