IMPA for model involving second order constructs

Frequently asked questions about PLS path modeling.
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sehrawat6
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Joined: Thu Dec 05, 2019 8:25 am
Real name and title: Kanchan Sehrawat, Research Scholar

IMPA for model involving second order constructs

Post by sehrawat6 » Thu Dec 05, 2019 8:41 am

I have a model in which a construct is measured using the two-step approach where the L.V scores obtained in the first step are used to run the entire model. I am consulting the steps for IMPA as recommended by Ringle and Sarstedt, 2016. The minimum requirement states that the latent variable scores should be such that they can be re-scaled from 0 to 100.
As my model includes a second-order construct which is also connected to other constructs in the full model. How can I run IMPA for the complete model as the min and max for the construct measured using a two-step approach are -3.371 to 2.137 rescaling this construct's values will not fall in the 0 to 100 range which is one of the essential requirements to run the analysis.

Please Help.

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

Re: IMPA for model involving second order constructs

Post by jmbecker » Wed Dec 11, 2019 5:32 pm

You need to run the IPMA also for the first-stage model and then take the unstandardized latent variables scores as indicators into the next stage. This is something that I would generally recommend, as you will get the same standardized results, but have some additional flexibility. For example, it is also necessary if you want to use PLSPredict or something else that operates on unstandardized data.
Dr. Jan-Michael Becker, University of Cologne, SmartPLS Developer
Researchgate: https://www.researchgate.net/profile/Jan_Michael_Becker
GoogleScholar: http://scholar.google.de/citations?user ... AAAJ&hl=de

sehrawat6
PLS Junior User
Posts: 2
Joined: Thu Dec 05, 2019 8:25 am
Real name and title: Kanchan Sehrawat, Research Scholar

Re: IMPA for model involving second order constructs

Post by sehrawat6 » Thu Dec 12, 2019 9:23 am

Thanks, Dr. Becker. Can you suggest any related literature if possible?

jmbecker
SmartPLS Developer
Posts: 1079
Joined: Tue Mar 28, 2006 11:09 am
Real name and title: Dr. Jan-Michael Becker

Re: IMPA for model involving second order constructs

Post by jmbecker » Wed Jan 22, 2020 2:50 pm

There is no literature on this yet.
Dr. Jan-Michael Becker, University of Cologne, SmartPLS Developer
Researchgate: https://www.researchgate.net/profile/Jan_Michael_Becker
GoogleScholar: http://scholar.google.de/citations?user ... AAAJ&hl=de

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