The IRT Procedure
Details: IRT Procedure
Subsections:
Notation for the Item Response Theory Model
Assumptions
PROC IRT Contrasted with Other SAS Procedures
Response Models
Marginal Likelihood
Approximating the Marginal Likelihood
Maximizing the Marginal Likelihood
Prior Distributions for Parameters
Factor Score Estimation
Model and Item Fit
Item and Test information
Missing Values
Output Data Sets
ODS Table Names
ODS Graphics
Last updated: December 09, 2022