MGA at second order construct

Frequently asked questions about PLS path modeling.
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Kim78
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Joined: Wed Sep 05, 2018 2:46 am
Real name and title: Tan Kim Lim, PhD Candidate

MGA at second order construct

Post by Kim78 » Wed Sep 05, 2018 3:02 am

I am a new researcher and recently I am working on a model that involved second-order constructs (reflective-formative, type ii), I used the two-stage approach. I draw a model with all variables and constructs including both first order and second order constructs and generate the latent variable scores for all the first order constructs. Then I use the first order latent variable scores as the indicators and link them to the second order constructs in a formative way and run the model again.

But I would like to perform MGA on two group of respondents. In my first order constructs, I can select Data Group information. But at the second order construct, the latent variables did not contain this information which is quite logical.

Given this situation, may I know how can I do MGA at the second order construct?

Thank you.

Kim

jmbecker
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Real name and title: Dr. Jan-Michael Becker

Re: MGA at second order construct

Post by jmbecker » Wed Sep 05, 2018 8:55 pm

You just need to also include the group information for the second-stage model. The observations in the first-stage model are in the same order as in your data set. Hence, you can just include the grouping variable from your first-stage model in your second-stage model.
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

lilyv
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Real name and title: Lily Vu

Re: MGA at second order construct

Post by lilyv » Tue Sep 10, 2019 4:25 pm

jmbecker wrote:
Wed Sep 05, 2018 8:55 pm
You just need to also include the group information for the second-stage model. The observations in the first-stage model are in the same order as in your data set. Hence, you can just include the grouping variable from your first-stage model in your second-stage model.
Dear Mr. Becker,
In this case, we have to use unstandardized or standardized LOCs score for the second-stage model ?

jmbecker
SmartPLS Developer
Posts: 1052
Joined: Tue Mar 28, 2006 11:09 am
Real name and title: Dr. Jan-Michael Becker

Re: MGA at second order construct

Post by jmbecker » Thu Oct 10, 2019 7:52 am

Both are working. Usually I would recommend to include unstandardized LOC scores because it enables you to use advanced PLS techniques such as IPMA, PLSPredict, etc. that rely on unstandardized estimates to some degree.
But for the normal analysis both should provide the same standardized path coefficients, loadings, etc.
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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