Hello, How can I check for overdispersion in a lmer with proportion data? There is no residual deviance output like in a glm thanks ~ janeene
checking for overdispersion in lmer?
2 messages · touchtonj, John Maindonald
The totals (input as weights if you are fitting proportions) need to be supplied, with family=binomial. You need to model the extra variance, with observation level random effects. If you need an example, some of can supply one. I gave an example for overdispersed Poisson in a Dec 12 message last year. John Maindonald email: john.maindonald at anu.edu.au phone : +61 2 (6125)3473 fax : +61 2(6125)5549 Centre for Mathematics & Its Applications, Room 1194, John Dedman Mathematical Sciences Building (Building 27) Australian National University, Canberra ACT 0200. http://www.maths.anu.edu.au/~johnm
On 05/08/2010, at 11:37 PM, touchtonj wrote:
Hello, How can I check for overdispersion in a lmer with proportion data? There is no residual deviance output like in a glm thanks ~ janeene
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