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Subject: morphometric measures of dimorphism
Date: Sun, 25 Jul 2010 12:44:39 -0400
From: [email protected]
To: [email protected]
Hi All,
I have a project in which I've extracted the browridge area of crania
and I'm interested in male and female differences in shape, and how
these differences vary across populations. Ideally, I'd love to use
sliding landmarks on the 3D surface, but I can't seem to come across a
program to help me out with that. In the mean time I've taken some
transects and have equally spaced points along these curves to describe
the overall shape. I've done the Procrustes superimposition and the PCA
and it looks to pick up the shape differences I'm interested in and
separates males and females well.
What I'd really like to do, however, is have some kind of measure of
dimorphism that I can compare to other populations, to determine whether
some populations are more dimorphic in brow shape than others. For
example in stature the most common method is taking the ratio of average
male stature to female. Any ideas of the best way of doing this? I
thought maybe if I conducted a discriminant function for all populations
pooled, then maybe I could compare the average score of males and
females from each sample???
Thanks in advance for any insight and guidance!
Heather Garvin
[email protected]
