Re: [R-sig-phylo] PGLS vs lm

2013-07-21 Thread Tom Schoenemann
Hi all, I'm still unsure of how I should interpret results given that using PGLS to predict group size from brain size gives different significance levels and lambda estimates than when I do the reverse (i.e., predict brain size from group size). Biologically, I don't think this makes any

Re: [R-sig-phylo] PGLS vs lm

2013-07-21 Thread Tom Schoenemann
Thanks Liam, A couple of questions: How does one do a hypothesis test on a regression, controlling for phylogeny, if not using PGLS as I am doing? I realize one could use independent contrasts, though I was led to believe that is equivalent to a PGLS with lambda = 1. I take it from what