I am running HLM with POISSON estimation. I need to determine the ICC, PVAF and pseudo R square. I thought it was the same calculation as when running the logistic HLM. But when I use the same formula for the Poisson as with the logistic my pseudo R square is enormous (.9888). Is there a different formula used to calculate ICC, PVAF and pseudo R square with Poisson?

Reference

• Nakagawa, S & Schielzeth, H (2013) A general and simple method for obtaining R2 from generalized linear mixed-effects models. Methods in Ecology and Evolution. 4: 133-142
• Nakagawa, S. & Schielzeth, H. (2010) Repeatability for Gaussian and non-Gaussian data: a practical guide for biologists. Biological Reviews. 85: 935-956