Mediating effect of a nonlinear relationship

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yiqingyu
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Mediating effect of a nonlinear relationship

Post by yiqingyu » Mon Dec 11, 2017 4:04 am

Dear PLS developers,
Sometimes the curvilinear relationship is mediated by a third variable, like X^2 -->Mediator-->Y. To test the direct effect from the quadratic term X^2 to Y, one has to establish an arrow from X^2 to Y, which is however currently not feasible in SmartPLS.
Is it possible to integrate the function of testing the mediating effect of a nonlinear relationship into smartPLS?

Thank you!

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

Re: Mediating effect of a nonlinear relationship

Post by jmbecker » Mon Dec 11, 2017 12:11 pm

Well you can do so, be adding a X² term to the relation with M and another X² term to the relation with Y. You will have X² then twice in your model, but this is not a problem as they are effecting different outcomes (DVs).
Dr. Jan-Michael Becker, University of Cologne, SmartPLS Developer
Researchgate: https://www.researchgate.net/profile/Ja ... v=hdr_xprf
GoogleScholar: http://scholar.google.de/citations?user ... AAAJ&hl=de

yiqingyu
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Posts: 13
Joined: Tue May 18, 2010 3:03 pm
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Re: Mediating effect of a nonlinear relationship

Post by yiqingyu » Sat Dec 16, 2017 8:15 am

Oh yes, you are right, just add another quadratic term to Y!
Thank you !

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