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Message/Author
 Magda Chmiel posted on Monday, April 23, 2012 - 7:03 am
Dear Dr. Muthèn:
I have to compute a latent variable (ABS – affective balance score) that represents the latent difference of two latent variables (PA – positive affect and NA negative affect). Then I need to regress the obtained latent score (ABS) on another latent variable (IQ). I have heard of computing latent difference score which should be NA = PA@1 and then computing NA on IQ – where NA represents now the ABS. Is that syntax correct? OR do you have other suggestions how to best compute the difference of two latent variables?
Thank you




MODEL:


IQ by IQ_VB
IQ_RA
IQ_VI
IQ_SP;

NA by Q_NA_1_2
Q_NA_2_2
Q_NA_3_2;

PA by Q_PA_1_2
Q_PA_2_2
Q_PA_3_2;


NA on PA@1;

NA on IQ;
 Linda K. Muthen posted on Monday, April 23, 2012 - 1:42 pm
Remove:

NA on PA@1;

NA on IQ;

Try:

diff BY;
diff ON pa@1 na@-1;
diff@0;
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