- Handles IRT linking for binary and polytomous items
- Supported linking models include any combination of Rasch, 2PL, 3PL, PCM, RSM, GRM, or GPCM
- Mean/mean, mean/sigma, Haebara, Stocking-Lord procedures
- Fixed common item parameter estimation for Rasch, partial credit, and rating scale models
- Robust z statistic for item parameter drift
- Item parameter correlations
- Save transformed person and item values to database
- IRT true score equating using any combination of Rasch, 2PL, 3PL, PCM, RSM, GRM, or GPCM