Moderated mediation index calculation

Questions about the implementation and application of the PLS-SEM method, that are not related to the usage of the SmartPLS software.
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plslearner
PLS Junior User
Posts: 2
Joined: Wed Mar 30, 2022 8:31 am
Real name and title: LD, Faculty

Moderated mediation index calculation

Post by plslearner »

Hi,

I have a question about the calculation of the index of moderated mediation (Hayes, 2015).

If I have a moderated mediation model and all constructs in the model are latent variables measured with multiple items. In order to test the significance of the conditional indirect effect of the mediator, how do we calculate the index of moderated mediation? I understood the formula but have difficulty finding the data for the calculation.

After running bootstrapping (5000 subsamples) with the model, under the "final results"->"specific indirect effects"->"sample" button, I can find the coefficients of simple effect and moderating effect" for all 5000 bootstrapping cases. However, in order to calculate the data series of the index of moderated mediation, I need the latent variable scores of the moderator. To match with 5000 bootstrapping coefficients, I need all 5000 latent variable scores of the moderator. But I can't find the 5000 bootstrapping dataset in SmartPLS.

Could anyone tell me where I can find the latent variable scores of the moderator for 5000 bootstrapping cases? And the latent variable scores applied to the index of moderated mediation calculation should be standardized or non-standardized?

Thanks in advance!

LD
jmbecker
SmartPLS Developer
Posts: 1281
Joined: Tue Mar 28, 2006 11:09 am
Real name and title: Dr. Jan-Michael Becker

Re: Moderated mediation index calculation

Post by jmbecker »

This paper should explain how to do it in PLS-SEM: https://dl.acm.org/doi/abs/10.1145/3505639.3505645
Dr. Jan-Michael Becker, BI Norwegian Business School, SmartPLS Developer
Researchgate: https://www.researchgate.net/profile/Jan_Michael_Becker
GoogleScholar: http://scholar.google.de/citations?user ... AAAJ&hl=de
plslearner
PLS Junior User
Posts: 2
Joined: Wed Mar 30, 2022 8:31 am
Real name and title: LD, Faculty

Re: Moderated mediation index calculation

Post by plslearner »

Thank you very much! I will review the paper you recommended.
andreyandoko
PLS Junior User
Posts: 2
Joined: Fri Jul 08, 2022 5:24 am
Real name and title: Andrey Andoko MSc

Re: Moderated mediation index calculation

Post by andreyandoko »

The index of moderated mediation in SmartPLS, you can get from Specific indirect effect table at row : X*W->M->Y (X : IV, M : Mediator, Y:DV, W:moderator). From that table, we can get p value and Confident Interval as well.
you can prove Hayes formula :
w (Index of moderated mediation) = p2*p5
p2 : path coefficient M -> Y
p5 : path coefficient X*W -> M

Hope it will help
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