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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? |
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A second-order factor must have at least three first-order factors for the model to be identified. Your model is not identified. |
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Thank you for the help, Dr. Muthen. I don't understand, though, why the second-order 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) first-order factors. But now the second-order factor with two-first-order factors does not work when using data with both groups (males and females). Could you please explain why the second-order factor having two first-order factors worked in one case but not the other? Thank you very much. |
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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 second-order factor model with two first-order factor indicators is not identified. |
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I will send you the outputs. Thank you, Dr. Muthen! |
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