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Mplus Discussion > Categorical Data Modeling >
 Thomas Olino posted on Thursday, August 23, 2007 - 12:03 am

I am helping examine differential item functioning between men and women on a number of categorical indicators. I had been planning on using the grouping option to specify multiple groups, however, when I do this, the program halts and requests that I use the knownclass option. I have 2 points that I want to clarify:

1) If I change the estimator to WLSMV and run the model under those assumptions, the results of the DIF analyses would be interpretable ftom the difftest command, right?

2) If I use the knownclass command, I would specify:

classes are sex (2) c (2);
knownclass is sex (1=male 2=female);

and then run the analysis with an overall model and class specific models to test DIF. Is that correct?


 Linda K. Muthen posted on Thursday, August 23, 2007 - 5:22 pm
1. Yes.

2. Yes.
 Stata posted on Thursday, October 04, 2012 - 8:13 pm
Dr. Muthens,

I am interested in conducting
1) differential item functioning with IRT, logistic regression, and Mantel-Haenszel. I haven't found any examples (syntax) in Mplus website regarding how these DIF methods are used with Mplus. Is it possible to conduct these analysis with Mplus? I hope it is possible.

2)The dataset which will be used for the analysis is a national dataset. In this case, is it necessary to incorporate sampling weight in DIF analysis?

Thank you
 Bengt O. Muthen posted on Friday, October 05, 2012 - 2:50 pm
IRT DIF can be investigated in Mplus using the MIMIC (factor analysis with covariates) approach or the multiple-group approach. Please see the Topic 1-2 handouts and videos on our web site. You can use ML, WLSMV, or Bayes estimation.

Sampling weights should and can be included.
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