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closeRegression slopes
Posted by caio_maximino on 28 Mar 2008 at 13:39 GMT
Relative brain and testis sizes were represented by the residuals of brain and testis size regressed on male body mass using the least-squares model.
http://plosone.org/article/info:doi/10.1371/journal.pone.0000062#article1.body1.sec4.p1
Were regression slopes used to correct for body mass? If so, what least-squares model was used? I would suggest using regression slopes derived either from the PGLS model or phylogenetic independent contrasts. See references for PDAP: http://www.biology.ucr.edu/people/faculty/Garland/PDAP.html
RE: Regression slopes
schillaci replied to caio_maximino on 06 Apr 2008 at 16:23 GMT
Thank you for your interest in the research and for your comments. I used ordinary least-squares regression. Regression parameters were estimated using bootstrapping. I will have to look into the PGLS model you mentioned, I am not aware of its advantages and limitations.