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 Tim Wind posted on Tuesday, June 05, 2012 - 7:04 am
Dear Linda,

My research question is related to multilevel growth modeling. We did research in Rwanda and appied an intervention that fosters community social capital which in turns influences mental health.


We measured mental health on three time points (within level), measured social capital on three time points (between level), and have an intervention group and a control group (u-variable which is independent).

The idea is:
Intervention (intervention versus control) --> community social capital (t1, t2, t3) --> mental health (m1, m2, m3).

How do I analyse this hypothesis in MPlus (with multilevel growth modeling?)?
Further, how can I use a categorical variable as an independent variable? In the output, it says a categorical 'u'-variable can only be used as a dependent variable.

Thank you very much in advance!

Tim Wind
 Linda K. Muthen posted on Wednesday, June 06, 2012 - 4:26 pm
The scale of independent variables is not an issue in model estimation. In regression, independent variables can be binary or continuous. In both cases, they are treated as continuous in model estimation.

Is the intervention on the within or between levels?
 Tim Wind posted on Thursday, June 07, 2012 - 12:06 am
Thank you for the explanation on independent variables. The intervention is on the between level.
 Linda K. Muthen posted on Thursday, June 07, 2012 - 11:08 am
Then you can only use it in the between part of the model.
 Tim Wind posted on Wednesday, June 27, 2012 - 3:39 am
Thank you. What analysis from the User guide can I use to test my hypothesis over time?

Intervention (intervention versus control) --> community social capital (t1, t2, t3) --> mental health (m1, m2, m3).

Thank you in advance.
 Linda K. Muthen posted on Wednesday, June 27, 2012 - 11:41 am
See the examples in Chapter 9. See also the Topics 7 and 8 course videos and handouts.
 Tim Wind posted on Thursday, June 28, 2012 - 12:19 am
Dear Linda,

What analysis can I conduct to test my model:

Intervention (intervention versus control) --> community social capital (t1, t2, t3) --> mental health (m1, m2, m3).

Given that Intervention and Community social capital find themselves on the community level and mental health is on the individual level.

What section of the Mplus userquide is helpful for this?

Best, Tim
 Linda K. Muthen posted on Thursday, June 28, 2012 - 5:35 am
Variables on the between level can be used only on the between level. A variable on the within level can be used on both levels. See Examples 9.1 and 9.2 for the building blocks you can use to develop your model.
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