Polytomous Rasch models PreviousNext
Mplus Discussion > Categorical Data Modeling >
 Ineta Sokolowski posted on Sunday, April 06, 2008 - 11:36 pm
I have questionnaire data with 4 answer categories (from not agree to agree very much). I would like to know, if it is possible to estimate a polytomous Rasch model in Mplus. If yes, how would I do it and what output do I get?
 Linda K. Muthen posted on Monday, April 07, 2008 - 9:06 am
Yes, you would free all factor loadings and hold them equal while fixing the factor variance to one. There is nothing special that needs to be done to the thresholds.
 Jeongwook CHOI posted on Thursday, July 25, 2019 - 8:43 pm

I analyzed polytomous IRT model PCM using Mplus8.

PCM has constraint that fix discrimination parameter to 1.

But, it is not 1 at Mplus8 output.

so how do I analysis PCM that constrain discrmination parameter to 1.

if there are any ways, please inform me that.

thank you very much.
 Bengt O. Muthen posted on Friday, July 26, 2019 - 6:48 am
We need to see your full output - please send to Support along with your license number.
Back to top
Add Your Message Here
Username: Posting Information:
This is a private posting area. Only registered users and moderators may post messages here.
Options: Enable HTML code in message
Automatically activate URLs in message