Comparing model fit when changing ass... PreviousNext
Mplus Discussion > Latent Variable Mixture Modeling >
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 Carla Bann posted on Tuesday, June 26, 2007 - 3:53 pm
I am running a latent profile analysis. I would like to compare a 4 class model assuming equal variances for the indicator variables to one allowing the variances to be freely estimated. Is there a way to determine whether freeing the variances significantly improves the model fit? For example, would it be appropriate to compute a chi-square difference test using the values for the 2 models listed as "Loglikelihood H0 value?" Thank you!
 Linda K. Muthen posted on Tuesday, June 26, 2007 - 4:10 pm
You can use the loglikelhoods from the two models. -2 times the loglikelihood difference is in the chi-square metric.
 Carla Bann posted on Tuesday, June 26, 2007 - 4:28 pm
Thank you for the help!
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