Comparison of Multidimensional Item Response Models: Multivariate Normal Ability Distributions Versus Multivariate Polytomous Ability Distributions GDM MIRT 2PL
- Author(s):
- Haberman, Shelby J.; von Davier, Matthias; Lee, Yi-Hsuan
- Publication Year:
- 2008
- Report Number:
- RR-08-45
- Source:
- ETS Research Report
- Document Type:
- Report
- Page Count:
- 25
- Subject/Key Words:
- Item Response Models, Multidimensional Item Response Theory (MIRT), Multivariate Analysis, Gauss-Hermite Integration, Log-Linear Modeling, 2-Parameter Logistic (2PL) Model, General Diagnostic Model (GDM)
Abstract
In the case of the multivariate normal ability distribution, multivariate adaptive Gauss-Hermite quadrature can be employed to greatly reduce computational labor. In the case of a polytomous ability distribution, use of log-linear models permits efficient computations.
Read More
- Request Copy (specify title and report number, if any)
- http://dx.doi.org/10.1002/j.2333-8504.2008.tb02131.x