Urgent Multilevel Simple slope test s... PreviousNext
Mplus Discussion > Dynamic Structural Equation Modeling >
 Yi-Ying Chang posted on Wednesday, November 15, 2017 - 12:51 am
I'm much appreciated if you can advise me what the syntax for multilevel simple slope test in Mplus. Now I have two levels. bottom-up interaction. The interaction is high level moderator. The DV is high level variable. IV is lower level variable.
The reviewers asked for it.
Thank you so much.
 Bengt O. Muthen posted on Wednesday, November 15, 2017 - 1:12 pm
See Cross-level interaction plots at our web page

 Maurits Masselink posted on Wednesday, July 25, 2018 - 3:45 am

I have read different mplus forum posts and examples but unfortunately still do not understand how to do significant tests for the simple slopes in DSEM. I tried to work with model constraint and assigning labels to parameters, but this was not allowed. Could you point me to the right direction? To be clear, I do not only want to plot the interaction, but most importantly, I want to test te significance of the slopes.

In my model below, the SE_ACC effect is moderated by the between person variable BSE. What I would like to do is test slopes of high (+1SD) and low(-1SD) BSE.


sSE | SE on SE&1;

SE_ACC| SE on Accept&1 ;
ACC_SE | Accept on SE&1;
ACC | Accept on Accept&1;

se accept SE_ACC on BSE ;
SE with Accept;


Your guidance is much appreciated,

 Bengt O. Muthen posted on Wednesday, July 25, 2018 - 4:06 pm
You could write on Between:

[SE_ACC] (a);

Model Constraint:

Loop (m,x,y,0.1);
sslope = a+b*m;

where x and y represent the lower and upper limits of your plot's x-axis and m represents values of the moderator BSE. For instance, x can be chosen as 1SD below the mean and y 1SD above the mean, where the mean refers to the sample mean of BSE and SD refers to the sample standard deviation of BSE.

If this doesn't help, send your output to Support along with your license number.
 Maurits Masselink posted on Thursday, July 26, 2018 - 4:12 am
Thank you very much, that worked, and I see where it previously went wrong now!
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