Different output using parameter labels PreviousNext
Mplus Discussion > Growth Modeling of Longitudinal Data >
Message/Author
 Marlou Poppelaars posted on Tuesday, November 11, 2014 - 12:15 am
Hi,
Before performing a Wald test I have assigned labels to my parameters, however after doing this my output changed (e.g. different intercept and slope values). I believe the output should remain the same as I am only assigning names. Who can tell me what I am doing wrong?

My original syntax:

MODEL: i s qs | t1bc_es@-3.75 t5bc_es@-3.5 t9bc_es@-3.25
t11bc_es@-1.625 t12bc_es@0;
i s qs ON t0bc_es
conovk
conspx
conos;

My syntax assigning parameter labels:

MODEL: i s qs | t1bc_es@-3.75 t5bc_es@-3.5 t9bc_es@-3.25
t11bc_es@-1.625 t12bc_es@0;
i s qs ON t0bc_es (p1)
conovk (p2)
conspx (p3)
conos (p4);

Thanks!
 Linda K. Muthen posted on Tuesday, November 11, 2014 - 4:37 am
i s qs ON t0bc_es (p1)

says that i ON t0bc_es, s ON t0bc_es, and qs ON t0bc_es are equal. I think you want to say

i ON t0bc_es (p1);
s ON t0bc_es (p5);
qs ON t0bc_es (p6);
 Marlou Poppelaars posted on Tuesday, November 11, 2014 - 8:59 am
Thank you! That solved the problem!
However, when I now perform the wald test, it does not appear in the output. I think this might be because I am testing too many relationships at once. My syntax:

MODEL: i s qs| t1bc_es@-3.75 t5bc_es@-3.5 t9bc_es@-3.25
t11bc_es@-1.625 t12bc_es@0;
i ON t0bc_es (p1)
conovk (p2)
conspx (p3)
conos (p4);
s ON t0bc_es (p5)
conovk (p6)
conspx (p7)
conos (p8);
qs ON t0bc_es (p9)
conovk (p10)
conspx (p11)
conos (p12);

MODEL TEST:
0 = p1;
0 = p2;
0 = p3;
0 = p4;
0 = p5;
0 = p6;
0 = p7;
0 = p8;
0 = p10;
0 = p11;
0 = p12;

I want to test if adding the condition variables (conovk, conspx and conos) together explain significant variation. Is there a way to do this? I am using multiple imputed data.
 Linda K. Muthen posted on Tuesday, November 11, 2014 - 1:25 pm
Please send the output and your license number to support@statmodel.com.
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