Validating second order formative construct

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neethu856
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Real name and title: Nethu M

Validating second order formative construct

Post by neethu856 » Wed Jan 16, 2019 12:39 pm

Please help.

I have a second order formative endogenous construct in my model. But I struggle in validating the formative second-order construct with all formative indicators on the first and second level. Anyone know exact steps. Any good references? Whether we have to check VIF, outer weights etc for second order one?
From the base model using the repeated indicator approach, with latent variable scores I have built the updated model. Whether that updated model needs to be used for formative model assessment and all further structural model assessments? But I found difficulty in analysing the formative second-order construct. Please help.

jmbecker
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Re: Validating second order formative construct

Post by jmbecker » Fri Jan 18, 2019 9:08 am

What exactly are your problems?
Generally, you want to apply all assessment criteria that you use for first-order constructs also for the second-order construct just that the weights there are the path coefficients from the first-order constructs to the second-order construct (and not the repeated indicators).
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

lockylaw
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Re: Validating second order formative construct

Post by lockylaw » Thu Apr 25, 2019 7:28 am

I think I have a similar question. I have a formative-formative type HCM and I chose the two-stage approach. After the PLS Algorithm calculation in the first stage, there are two VIF values every indicator, and I am unsure which one I should look at. Thanks.

lockylaw
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Re: Validating second order formative construct

Post by lockylaw » Fri Apr 26, 2019 7:13 am

Oh, I am answering my own question now.

Basically one of the two VIF values of every indicator in the first stage is the same as the VIF values of all the indicators pointing to one single construct, so making it HCM does not change the VIF values, but it does change the weights of the formative indicators.

dlaude
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Re: Validating second order formative construct

Post by dlaude » Tue Jun 04, 2019 11:39 am

When I estimate the (outer) weights and loadings of an HCM, SmartPLS gives me two values for each indicator: one weight / loading "from" the indicator "to" the 1st order construct (see output: CONS3 -> CONS) and one weight / loading from the indicator to the 2nd order construct (see output: CONS3 -> SE).

If I understand correctly, I should use the weights and loadings of an indicator to the 1st order construct to validate the 1st order construct. Additionally, I use the weights (path coefficients) from the 1st order to the 2nd order constructs to validate the 2nd order constructs.

My question is: Do I need the weights / loadings that go "all the way" from the indicators to the 2nd order construct (e.g. CONS3 -> SE) to validate the 1st or 2nd order?

Weights.PNG
Weights.PNG (2.97 KiB) Viewed 287 times

jmbecker
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Re: Validating second order formative construct

Post by jmbecker » Tue Jul 02, 2019 9:52 am

The following paper nicely summarizes the evaluation of second order constructs:
https://www.researchgate.net/publicatio ... in_PLS-SEM
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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