Medmod

[Mercy93]

I am writing currently my master thesis and using Jamovi for the statistic part.

I want to do a moderation and also a mediation analysis with medmod. But I was wondering if I need to do mean center the predictor beforehand?
Do you have any general guideline how medmod works and are the results similar to SPSS?

Thanks for help

[HAP]

I'm almost certain that medmod automatically centers for moderation. I ran moderation analyses using medmod then using PROCESS on SPSS (on SPSS choosing center all variables in PROCESS) virtually identical results as in jamovi.

[MAgojam]

I'm almost certain that medmod automatically centers for moderation.

Hey @HAP,
if you take a look at the code here:
https://github.com/raviselker/medmod/bl ... /R/utils.R
it's here
https://github.com/raviselker/medmod/bl ... #L198-L201

you can eliminate the almost!

Cheers,
Maurizio