[R] Overdispersion, AIC and mixed models

From: Julien Martin <julien.martin2_at_usherbrooke.ca>
Date: Tue, 19 Feb 2008 22:25:26 -0500


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, chisquare/DF)?

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



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