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
