Re: [R] General question about GLMM and heterogeneity of variance

I will also post the above to the sig mixed models forum now. Thanks. -- View this message in context: http://r.789695.n4.nabble.com/General-question-about-GLMM-and-heterogeneity-of-variance-tp4424429p4431107.html Sent from the R help mailing list archive at Nabble.com. __

Re: [R] General question about GLMM and heterogeneity of variance

Sorry, I was not particularly clear. I ran my data through a GLM (the response variable is a proportion, and I ignored the random effects for the purposes of data exploration), and plotted the residuals against each of my predictor variables (some of which are continuous, some categorical). The h

[R] General question about GLMM and heterogeneity of variance

My data have heterogeneity of variance (in a categorical variable), do I need to specify a variance structure accounting for this in my model or do GLMMs by their nature account for such heterogeneity (as a result of using deviances rather than variances)? And if I do need to do this, how do I do i