Hi,
I know that is not possible make a stepwise procedure using REML in R, I can
use ML for this.
For nested design it may be very dangerous due the difference in variance
structure, mainly in a splitplot design. ML make significative variables that
REML dont make.
I read an article that is made a stepwise procedure using GENSTAT.
from article:
"Terms were dropped from a model in a stepwise procedure by assessing the
change in deviance between the full model and the submodel."
All are made using REML.
It is possible?! I dont know GENSTAT.
Thanks
Ronaldo
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