Abstract
The effects of three scale identification constraints in mixture IRT models were studied. A simulation study found no constraint effect on the mixture Rasch and mixture 2PL models, but the item anchoring constraint was the only one that worked well on selecting correct model with the mixture 3PL model.
| Original language | English |
|---|---|
| Pages (from-to) | 1-26 |
| Number of pages | 26 |
| Journal | Journal of Modern Applied Statistical Methods |
| Volume | 18 |
| Issue number | 1 |
| DOIs | |
| State | Published - 2020 |
Keywords
- Bayesian estimation
- Item response theory
- MCMC
- mixture models
- scale identification