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Jan Fax posted on Thursday, September 18, 2008 - 11:47 pm
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Hello 3 questions how to relate the Mplus ex10.6 output to the parametric ML-LCA approach suggested by Vermunt (2003). For the cluster-level covariate w, there is an effect of .79 on the factor capturing the between-variation of the within-level latent class intercepts. Q1: Can this estimate be used to answer a question like "how does w affect the log odds of belonging to (within-level)latent class 1 vs. 2"? (such an interpretation is given in the vermunt-article, example on "educational research", effect of the school-level variable CITO, page 232). Q2: If so, how? Q3: Can I estimate intraclass correlations to check whether the lc intercepts differ substantially between groups? How? Many thanks! |
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Q1. Q2-Q3. This relates directly to 2-level logistic regression which we discuss in our courses. See the handout for Topic 7 at http://www.statmodel.com/newhandouts.shtml where slides 44-49 go through an example and slide 49 discusses the level 2 effect in 3 different ways. The example concerns a random intercept. With a continuous level-2 covariate w you can consider a 1 SD change in w and how much higher or lower the class probabilities are due to this change. Such probabilities can then be converted into odds. |
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