Hi 

I want to do use AIC for model selection on mixed model. However, before
going deeper in the model selection, I want to assess is there is
overdispersion with the full model in order to decide if I should use QAIC
instead of AIC.

Is there a way to compute a chisquare goodness of fit test for mixed model
calculate the variance inflation factor (sensu Burnham and Anderson)?

Or should I use another approach to evaluate overdispersion in mixed model?

Thanks

 

Julien



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