[R] Question regarding lmer with binary response

Bernd Weiss bernd.weiss at uni-koeln.de
Sun Sep 4 18:58:30 CEST 2005

Dear all, dear Prof. Bates,

my dependent variable (school absenteeism, truancy[1]) is a binary 
response for which I am trying to compute an unconditional mixed 
effects model. I've got observations (monday, wednesday and friday) 
nested in individuals (ID2), which were nested in classes (KID2) and 
schools (SID), i.e. a 4-level mixed effects model. 

In short, I was trying without success. I got no sensible results 
using lmer as well as using glmmPQL. I played around with the control 
parameters and the methods (PQl, Laplace) in lmer without any effect. 
I would really appreciate if someone could have a look into my data 
and tell me what's going wrong here. 

My R script and data can be found at: 




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