1-1-1 multilevel mod. med.: unusual r... PreviousNext
Mplus Discussion > Multilevel Data/Complex Sample >
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 Sven Lohrey posted on Friday, January 16, 2015 - 9:30 am
Dear Madam or Sir,

I tried to run a 1-1-1 multilevel moderated mediation model trying to combine what Preacher, Zyphur, and Zhang (2010) call an "unconflated model" with a moderation of the a path. I tried to test moderation at mean, +1SD, and -1SD levels of the moderator Int1 with the below syntax. The model estimation etc. all terminated normally, however, my problem is that for all three levels of the moderator (mean, +/- 1SD) I received the exact same estimate and SE for the conditional indirect effect and that canīt be accurate so maybe I made a mistake at some point.
It would be very nice if you could help me with this issue.

Thank you very much!
 Sven Lohrey posted on Friday, January 16, 2015 - 9:32 am
The syntax I used is:

USEVARIABLES ARE DayAut DayFlow DayExlag DayCP x1mean x2mean x3mean Int1;

CLUSTER IS Person;

CENTERING IS GROUPMEAN (DayFlow DayExlag DayAut);

WITHIN ARE DayAut DayFlow DayExlag Int1;

BETWEEN ARE x1mean x2mean x3mean;

Missing are all (999);

DEFINE:
x1mean = Cluster_mean(DayFlow);
x2mean = Cluster_mean(DayExlag);
x3mean = Cluster_mean(DayAut);
Int1 = DayExlag*DayAut;

ANALYSIS: TYPE = TWOLEVEL; ESTIMATOR = ML;

MODEL:
%WITHIN%
DayCP ON DayFlow(bw);
DayCP ON DayExlag;
DayFlow ON DayExlag(aw1);
DayFlow ON DayAut(a2);
DayFlow ON Int1(a3);
[DayFlow@0];
DayExlag WITH DayAut Int1;
DayAut WITH Int1;

%BETWEEN%
x1mean x2mean DayCP;
x1mean ON x2mean(ab);
DayCP ON x1mean(bb);
DayCP ON x2mean;
x2mean WITH x3mean;

MODEL CONSTRAINT:
NEW (indb indw0 indw1 indw2 Autmean Authigh Autlow);
Autmean = 3.82;
Authigh = 5.07;
Autlow = 2.57;
indw0 =(aw1+a3*Autmean)*bw;
indw1 =(aw1+a3*Authigh)*bw;
indw2 =(aw1+a3*Autlow)*bw;
indb = ab*bb;
 Bengt O. Muthen posted on Friday, January 16, 2015 - 2:28 pm
Don't see an issue. Please send input, output, data, and license number to Support.
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