[R] p-values for GLMMs

[Cristina Gomes]

Hi there,
I have a question about the GLMM that I'm doing, that a statistician 
friend suggested I should have for my analysis. I would like to know if 
there's any way of obtaining a p value and R square for the full model 
(and not each variable separately) as to asses whether this model is 
somewhat appropriate or not. Can one do this for a GLMM in the lme4 
package?
The other thing I wanted to know if there's a way to obtain residuals 
for a GLMM in the lme4 package. I would like to see the effect of the 
significant variables by plotting the residuals of the model without the 
variable of interest against the variable of interest, but I haven't 
found a way of obtaining residuals.
I hope somebody can help me with this.
Thanks a lot,
Cheers,
Cristina.