multiple group CFA

[Hady]

Dear all,

I am with lavaan and trying to conduct a multiple group CFA for two groups, and I was wondering how can I set some modification to only one group, in Mplus there is an option to specify modiciations to each group, for example 

      

Variable:  names are

x1 x2 x3 x4 x5 x6 

x7 x8 x9 x10 

x11 x12 x13 x14;

fac1 by x1 x2 x3 x4 x5 x6 ;

fac2 by x7 x8 x9 x10;

fac3 by x11 x12 x13 x14;

[invol@0 cur@0 chal@0];

Model 1:

x2 with x7;

Model 2:

x1 with  x2;

but I couldn't figure how to do it in Lavaan. Thanks for your help

[Edward Rigdon]

The lavaan project site tutorial covers this. To allow residual covariance of x1 and x7 in group 1 but not group 2--

x1 ~~c(NA,0)*x7

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[Hady]

Thanks very much