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freechoice
2005 Sep 09
1
GlmmPQL help
...puts I receive are
sensible except for the degrees of freedom, which come out much larger than
expected. Can anyone advise please?
Exptl design:
Response = Choice
Fixed Factors = Position, Treatment and Sex
Random Factor = ID nested within Treatment and Sex
Covariate = Delay
The model:
glmmPQL(FreeChoice ~ Position * Treatment + Sex + Delay, random = list(~Sex
+ Treatment|Name), family = binomial)
Thanks, Mark
------------------------------------------------------------------------
Mark Steer
School of Biological Sciences
University of Bristol
Woodland Road
Bristol, BS8 1UG
tel - ++44 (0)117...
2005 Sep 20
0
Degrees of freedom in glmmPQL
...and keep getting bizarre degrees of freedom
appearing.
For instance, using the example data attached and a simplified model from
the one I need, I have: binary choice data, fixed factors = PositionIndex
and Treatment and random factor = Name nested within treatment. I use the
model:
glmmPQL(FreeChoice ~ PositionIndex + Treatment, random = ~1 +
Treatment|Name, family = binomial, data = Exemplar)
The output I receive gives the expected df for the treatment variables (df
= 47), but the PositionIndex df come out at 3953 when I think 7 should be
closer to the mark. Have I got my model wrong? T...