can you fit grad model into data what type of model is grm a function of what is the data used in rasch can a rasch model be modified lme4::glmer can you fit grm model to person data what is grm used for can i fit graded response in rasch model can you use rasch and lme4 to create a grm what is grm in rasch can we fit model in a rasch what is the fit grm can rasch fit rm when you can fit a grad response why not use glmm in a rasch model how to fit rasch response model in data how to fit grm how to fit grading in rasch model can you grad response model how to fit grad model