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Modified Graded Response Model (IRT)...
Categorical Data Modeling
posted on Thursday, March 05, 2009 - 9:23 pm
IRT a and b parameters in the Graded Response Model (Samejima, 1969; 1996) are easily derived from Mplus loadings and thresholds.
Is there any way to derive category threshold parameters (c) in the Modified Graded Response Model (Muraki, 1990) in Mplus?
Linda K. Muthen
posted on Friday, March 06, 2009 - 9:22 am
I don't know offhand as I am not familiar with the paper. If so, it would be using MODEL CONSTRAINT to define c.
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