>  This is probably harmless -- it means that an intermediate GLM step didn't quite work,

>  probably because you have strongly separated data (i.e. some places/factor combinations etc.

>  with all-zero or all-one data)

I do have strongly separated data, as some trap types did not move at all (therefore all zeros), and others moved a lot.


>  Can we see the results of sessionInfo()? I suspect you have a problem with methods from some

>  packages masking others.  If you have installed lme4 from r-forge, I suspect you should re-

>  install it from CRAN ...

The results from sessionInfo(model) are:

Error in as.list.default(X) :
  no method for coercing this S4 class to a vector

The packages in my workspace were (installed in order):

car
ggplot2
sos
glmmADMB
lme4
nlme
plotrix
cplm

I tried removing all that had to do with GLMMs (glmmADMB, lme4, nlme, cplm) and reinstalling only 'cplm' and have been able to get the summary() function to work.  This results in a list of t-values for each trap type.  From my background reading, I understand that p-values are difficult to determine in GLMMs, however, I am not sure how to interpret the t-values to estimate which trap type is different from the wood traps.  Here are the resulting t-values:

                                                    Estimate Std. Error   t value
(Intercept)                               0.05134    0.68273     0.075
trap_type5-slat                     -1.59469    0.44568    -3.578
trap_typevw-6                      -3.79851    0.71923    -5.281
trap_typevw-sponge         -2.41591    0.52667    -4.587
trap_typewire basket      -27.93281  386.0848    -0.072
trap_typewire on frame   -4.77199    0.90967    -5.246
trap_typewood-6                  0.29933    0.32652     0.917
trap_typewood-thick          0.27437    0.34785     0.789
trap_typeyb-6                      -4.27295    0.80548     -5.305
trap_typeyf-6                       -2.88076    0.58270     -4.944

According to the exploratory plot, it is likely that the wood-6 and wood-thick traps are not different from the standard control.  The others are probably different.

Is there a way to know for sure?

Thank you again,

Bryan


_____________________
Bryan Danson
Biological Scientist I
Fish and Wildlife Research Institute
Florida Fish and Wildlife Conservation Commission

"The significant problems we have cannot be solved at the same level of thinking with which we created them."
~Albert Einstein




	[[alternative HTML version deleted]]


