[R-sig-ME] How to get dispersion parameter from a binomial mixed model?

[v_coudrain at voila.fr]

Thank you very much for these useful comments. I run my models with both penalized quasi likelihood and logistic-normal-binomial distribution and I found some 
differences suggesting that penalized quasi likelihood is more conservative, which is something that I already heard. I noticed that logistic-normal-binomial method is 
gaining importance in the recently published papers, so that it seems to be a good opportunity. Anyway it would be very useful to have good support from an in-
depth work-out of this method as you did for Poisson-overdispersion. I'm quite sure that it should appear in the next time. 
Best
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