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1 vote

Model selection for glmer in R

One comment which stuck out to me: I have been told that this model may be too complex, and that I should try model selection to solve this. Based on the AIC (430.7), I think that this is indeed the ...
Shawn Hemelstrand's user avatar
0 votes

Model selection for glmer in R

As noted by Gregor above, there are a few different ways to compare models, but all will involve running additional models and comparing the AICs (or BICs) to see if the random effects structure is ...
Paul's user avatar
  • 56
2 votes

Mixed models - interactions or individual regression

In general, the interaction model would enable you to test if a treatment works better for one group than for another. With separate groups you would only see that there is a difference in treatment ...
BenP's user avatar
  • 1,169
1 vote

GLMM with negative binomial- narrowing down variables & choosing a model

Regarding your first question, it looks like the issue is that you have more predictors than observations. When you have a categorical covariate (e.g., Site), each level is treated as a separate ...
Laura Lee's user avatar
  • 311
0 votes

How to insert temperature and precipitation data on a GEE or GLMM model

More of a too long comment. I really want to study the effect of temperature and precipitation, and I am thinking of using them as fixed factors, but it does not sound correct because they are a ...
kjetil b halvorsen's user avatar
10 votes

Visualization of a mixed effect logistic regression model?

There are a number of ways to visualize logistic GLMMS. For my examples, I use a logistic GLMM from here using their same code in R (with some minor changes): ...
Shawn Hemelstrand's user avatar

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