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Mplus Discussion > Structural Equation Modeling >
 Eric Turkheimer posted on Tuesday, November 07, 2006 - 1:14 pm
Is it possible to use Monte Carlo procedures in MPlus to examine the power of a hypothesis with 2 df? Suppose I have parameters i, j and k, and I am interested in the power to test the hypothesis that i=j=k. In observed data, one would set them equal and examine the decrement in fit with 2df.

In the Monte Carlo module, you can look at the power of a 1 df test by defining


in the constraint block and looking at the distribution of new across replications. Is there a way to do it for the two df case?

 Bengt O. Muthen posted on Tuesday, November 07, 2006 - 1:59 pm
I think Model Test gets Monte Carlo summaries - that gives a Wald test of constraints that you define. See the MODEL TEST command in the 4.1 UG.
 Eric Turkheimer posted on Thursday, November 09, 2006 - 5:44 pm
I don't see Monte Carlo summaries of Model Test statements.... should I send you the output?

 Linda K. Muthen posted on Thursday, November 09, 2006 - 6:01 pm
 Bengt O. Muthen posted on Thursday, November 09, 2006 - 6:43 pm
Model Test produces the Wald Test fit that is shown in the Tests of Model
Fit section at the top of the output.
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