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Examples
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The IRT Procedure (
Experimental
)
Overview
Basic Features
Getting Started
A Simple 2PL Model
Syntax
PROC IRT Statement
BY Statement
COV Statement
EQUALITY Statement
FACTOR Statement
FREQ Statement
GROUP Statement
MODEL Statement
VAR Statement
VARIANCE Statement
WEIGHT Statement
Details
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
Factor Score Estimation
Model and Item Fit
ODS Table Names
ODS Graphics
Examples
Unidimensional IRT Models
Multidimensional Exploratory and Confirmatory IRT Models
Multiple-Group Analysis
References
Examples: IRT Procedure
Subsections:
51.1 Unidimensional IRT Models
51.2 Multidimensional Exploratory and Confirmatory IRT Models
51.3 Multiple-Group Analysis
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