Equality constraints for growth param... PreviousNext
Mplus Discussion > Growth Modeling of Longitudinal Data >
Message/Author
 elizabeth barker posted on Sunday, April 05, 2015 - 11:58 pm
To give some context piecewise model, continuous outcome, comparing two groups regarding growth differences. I want to constrain some parameters to be equal. Here is what I have so far, does this look correct?
model:
i3 s3| F11SCORE@0 W12SCORE@1 S12SCORE@2 F12SCORE@2 W13SCORE@2 S13SCORE@2 F13SCORE@2 W14SCORE@2 S14SCORE@2;

model NRD: F11SCORE@0 W12SCORE@1 S12SCORE@2 F12SCORE@2 W13SCORE@2 S13SCORE@2 F13SCORE@2 W14SCORE@2
S14SCORE@2(1);

Model RD: F11SCORE@0 W12SCORE@1 S12SCORE@2 F12SCORE@2 W13SCORE@2
S13SCORE@2 F13SCORE@2 W14SCORE@2 S14SCORE@2(1);
 Linda K. Muthen posted on Monday, April 06, 2015 - 7:41 am
It looks like you have the same model in overall and the group-specific MODEL commands. All parameters are fixed at the same values so there is no need to constrain them. They are already the same.
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