Partial Credit Model PreviousNext
Mplus Discussion > Categorical Data Modeling >
 Silvia Bacci posted on Friday, July 04, 2008 - 3:52 am
I would like to know if and how it is possible to estimate by MPLUS a multilevel Partial Credit Model or, that's the same, a random intercept ordinal logistic model for ADJACENT CATEGORIES (not for cumulative proportional odds).

Thank you very much!
 Bengt O. Muthen posted on Friday, July 04, 2008 - 11:40 am
No, that's currently not implemented. I am not sure if the Mplus Model Constraint feature could accomplish this, but it would probably be complicated.
 Diego Carrasco posted on Thursday, March 19, 2020 - 7:07 pm
Hi have different items with 2 categories and others with 4 categories. I've used TAM in the past, and that environment is possible to treat a 2 category item as an special case while fitting the partial credit model.

I've been trying to replicate this excercise with no sucess, by specifying

i3 (gpcm)
i4 (gpcm)
i5 (gpcm)

Am I doing something wrong? Or this feature is not implemented in MPLUS v8.4 ?
 Tihomir Asparouhov posted on Friday, March 20, 2020 - 5:15 pm
Take a look at Section 4
There are different parameterizations for the GPCM. Check out the IRT parameterization section of the output. If you can't figure it out send the example as well as the TAM results to
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