[R] Test for random effects in GLM

Daniel Mastropietro mastropi at uwalumni.com
Fri Aug 2 02:38:04 CEST 2002


I would like to know how to test whether the 'subject' random effect is 
significant in a generalized linear model.

I am using glmmPQL() in the MASS package.
The response is binary and my model only has an intercept as fixed effect 
and 'subject' as random effect . That is, the fit is:

glmmPQL(y ~ 1 , random = ~ 1 | subject , family=binomial , data=data)

Thanks in advance

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