Multilevel data and mediation/path model PreviousNext
Mplus Discussion > Multilevel Data/Complex Sample >
 Karin Truijen posted on Tuesday, March 30, 2010 - 2:44 am
I have multilevel data (two nested levels: individual and team) and an upper level and lower level mediation. I will hypothesize that an individual-level predictor (X) affects a group level mediator (M1), and affects another individual level mediator (M2), which, in turn affects a group level outcome (Y). Is there a way to test this model?

X (individual) - M1 (group level) - M2 (individual) - Y (group level)
 Linda K. Muthen posted on Tuesday, March 30, 2010 - 8:31 am
You would specify the model you show as follows where x and m2 are not put on the WITHIN list and m1 and y are put on the BETWEEN list:

m1 ON x;
m2 ON m1;
y ON m2;
 Franziska Reinhardt posted on Wednesday, January 15, 2020 - 12:04 pm
I find this forum extremely helpful and have already learned a lot. But now I have a problem where I can't find a solution:
I am having a multilevel 2-1-1 mediation with 2 predictors (x1, x2) and a dichotomous mediator (m) and a number of control variables (cv).
The model works very well, but if I would specify m as Categorical, the model does not work. What can I do?

Within= cv1 cv2 cv3 cv4;
between= X1Index AYoS X2index income;
Define: Center cv1 X1Index X2index AYoS (Grandmean);
Estimator= Bayes;
y ON cv1 cv2 cv3 cv4;
y ON M; !(bw)
y M;
M y X2 X1;
X1 BY X1Index AYoS;
X2 BY income X2index;
M ON X1 (a1);
M ON X2 (a2);
y ON M(b);
y ON X1 (c1);
y ON IN (c2);
X1 with X2;
New(indX1 indX2);
 Bengt O. Muthen posted on Wednesday, January 15, 2020 - 1:04 pm
We need to see your full output and, preferably, the data as well - send to Support along with your license number.
 Franziska Reinhardt posted on Saturday, January 18, 2020 - 3:02 am
Dear Mr Muthen, thank you for your answer, I have contacted my university because I use a general university access and they do not have a license number that I can use as an individual. Therefore I can not use the support. May I therefore ask a short question of understanding.
Do I have to specify a Binary Mediator for a multilevel analysis? Which estimator do I use for this?
 Bengt O. Muthen posted on Monday, January 20, 2020 - 8:07 am
Q1: Yes.

Q2: You can use ML (or MLR) or Bayes or WLSMV.
 Franziska Reinhardt posted on Tuesday, January 21, 2020 - 12:12 am
Thank you very much, I appreciate your response.
 Mplusquestions posted on Wednesday, February 05, 2020 - 10:56 am
Hi Mplus Team,

I have a three-level data-set (individual, team and organization) and I was hoping to test a moderated mediation in which a team level variable (coh) mediates a three-way interaction between two team (Tid and Tdiv) and one organization-level variables (cOid) on an individual outcome (OCB). X Y Z are control variables on the individual level.

1. Is this possible with MPLUS; Type = Threelevel random? Estimator = MLR.

2. Disregarding the model constraints would the below code fit with the description above?


OCB ON coh (b1);
OCB ON Tid (cdash);
a | coh ON Tid (a1);
b | coh ON Tdiv (c1);
c | coh ON TdivxTid (c2);

coh ON cOid (c6);
a ON cOid (c3);
b ON cOid (c4);
c ON cOid (c5);

Thank you in advance for the reply.
 Bengt O. Muthen posted on Thursday, February 06, 2020 - 12:35 pm
Yes on both.
 Mplusquestions posted on Thursday, February 06, 2020 - 1:26 pm
Great, thank you for the reply!

Does this seem accurate in terms of constraints to calculate the indirect effect?

NEW (Low_cOid HI_cOid Low_tdiv HI_tdiv


IND_LOWcOidLOWdiv = a1*b1 + b1*c1*c2*c3*c4*c5*LOW_cOid*LOW_tdiv;
IND_LOWcOidHIdiv = a1*b1 + b1*c1*c2*c3*c4*c5*LOW_cOid*HI_tdiv;
IND_HIcOidLOWdiv = a1*b1 + b1*c1*c2*c3*c4*c5*HI_cOid*LOW_tdiv;
IND_HIcOidHIdiv = a1*b1 + b1*c1*c2*c3*c4*c5*HI_cOid*HI_tdiv;
 Bengt O. Muthen posted on Thursday, February 06, 2020 - 3:43 pm
The top 2 levels are similar to twolevel mediation with random slopes so you can check how that is done in our Short Course Topic 7, slides 81 and on.
Back to top
Add Your Message Here
Username: Posting Information:
This is a private posting area. Only registered users and moderators may post messages here.
Options: Enable HTML code in message
Automatically activate URLs in message