I was reading your paper on IRT modeling: Muthén & Asparouhov (2013). Item response modeling in Mplus: A multi-dimensional, multi-level, and multi-timepoint example.
The paper said that scripts are available on the website, but I wasn't able to find it. I was able to find relevant information in the following link (https://www.statmodel.com/recentpapers.shtml ) , but couldn't locate the script itself.
Would you please help and point me to the right place to look? This would help me a lot! Appreciated!
Wendy Sun posted on Monday, March 23, 2015 - 4:40 pm
Thanks for providing the example syntax. I am a beginner to use Mplus for IRT analysis, and I have another question. In your example, if the the response category from y1 to y20 are different, like some of them are dichotomous, and the others are polytomous with different scales (e.g., 3 point and 4 point likert scale), do I need to do anything, like defining/grouping the items if I want to see the estimation of thresholds? Thanks.
Will you please direct me to the scripts for section 6: 2-level item bifactor explanatory factor analysis, section 7: 2-level bifactor confirmatory factor analysis, and section 8: 2-level item bifactor confirmatory factor analysis with random factor loadings?
Also, I wonder if you can share the data file for this paper.
You find them in "download output files" on our website:
Muthén, B. & Asparouhov, T. (2013). Item response modeling in Mplus: A multi-dimensional, multi-level, and multi-timepoint example. Forthcoming in Linden & Hambleton (2013). Handbook of item response theory: Models, statistical tools, and applications. download paper download Table 6 output download output files show abstract