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Mplus Discussion > Structural Equation Modeling >
 Sunny Duerr posted on Sunday, December 11, 2011 - 8:38 am
Hello Drs. Muthen,

The data I'm working with contains more than 50 groups available for multiple group analysis. In your Topic 1 handout you state that multiple group analysis is difficult to carry out with many groups (p. 203). I'm considering doing a cluster analysis to reduce the number of groups I'm dealing with and I have been searching for some guidelines on what constitutes "many" groups.

Do you have any references you could suggest that would clarify this?

Thanks in advance for any advice!
 Linda K. Muthen posted on Monday, December 12, 2011 - 10:12 am
More than 10 groups is many. I would suggest creating 49 dummy variables to see where important group differences may be found in the intercepts. Regress the factor on the dummy variables. Include MODINDICES (ALL); in the OUTPUT command. See where the regression of the y's on the dummy variables show intercept differences.
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