Message/Author 


I am getting an error message when performing a CFA multiple group analysis (comparing males and females) using the following syntax: Factor1 BY var1 var2 var3 var4; Factor2 BY var5 var6 var7; Factor3 BY Factor1 Factor2; Factor3 represents a "dimensional" factor which comprises factors 1 and 2. The first two syntax lines run fine but the "Factor3" seems to be the problem  as suggested by the Tech printout. I don't have any problems when running the 3 syntax commands on either the male or female group data individually. But when I run the syntax across both groups (using mgroup)that's when the problem occurs. Could you advise please? 


A secondorder factor must have at least three firstorder factors for the model to be identified. Your model is not identified. 


Thank you for the help, Dr. Muthen. I don't understand, though, why the secondorder factor worked when using data from one group (e.g., males). No error messages was generated. It seemed to have worked with two (not three) firstorder factors. But now the secondorder factor with twofirstorder factors does not work when using data with both groups (males and females). Could you please explain why the secondorder factor having two firstorder factors worked in one case but not the other? Thank you very much. 


You must have had some other restriction in the earlier model. I would have to see both outputs to see what the difference is. A secondorder factor model with two firstorder factor indicators is not identified. 


I will send you the outputs. Thank you, Dr. Muthen! 

Back to top 