Simulates new datasets from the posterior and compares the mean score
to the observed mean score. If the model fits well, the observed mean
(red dashed line) should fall within the simulated distribution (blue bars).
Usage
ppc_rasch(object, nsamples = 100)
Arguments
- object
A birt_fit object from rasch_fit().
- nsamples
Number of posterior predictive draws (default = 100).
Value
Invisibly returns a list with:
- y_rep
List of simulated response matrices.
- plot
The ggplot2 plot object.