Deal all,
as part of my PhD project I am creating a new formative scale.
Right now I am testing a pure formative single-item vesion (see exhibit SEM) vs. a reflective-formative multi-item version.
The outer VIF values in the single-item version (see ehibit VIF) seem to be unrealistic high.
Could they be truth? What might be the reason for it? Or coud it be a software bug? I do not know!
Looking for your comments, ideas...
Thank you.
Best wishes
Felix
Unrealistic high VIF values in formative SEM
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- PLS Junior User
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- Real name and title: Felix Horstmann
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- SmartPLS Developer
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- Real name and title: Dr. Jan-Michael Becker
Re: Unrealistic high VIF values in formative SEM
Hi Felix,
could you also provide the correlation matrix of your indicators? That would give clarity if VIFs are realistic or subject to a calculation problem.
It seems that there are two pairs of indicators which are almost identical in terms of covariation.
In addition: Where is the reflective part of your "reflective-formative multi-item version"??
could you also provide the correlation matrix of your indicators? That would give clarity if VIFs are realistic or subject to a calculation problem.
It seems that there are two pairs of indicators which are almost identical in terms of covariation.
In addition: Where is the reflective part of your "reflective-formative multi-item version"??
Dr. Jan-Michael Becker, BI Norwegian Business School, SmartPLS Developer
Researchgate: https://www.researchgate.net/profile/Jan_Michael_Becker
GoogleScholar: http://scholar.google.de/citations?user ... AAAJ&hl=de
Researchgate: https://www.researchgate.net/profile/Jan_Michael_Becker
GoogleScholar: http://scholar.google.de/citations?user ... AAAJ&hl=de
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- PLS Junior User
- Posts: 2
- Joined: Tue Jun 09, 2015 11:13 am
- Real name and title: Felix Horstmann
Re: Unrealistic high VIF values in formative SEM
I solved the problem.
It was a problem regarding missing data replaced by mean in European number format - but i did not change the SmartPLS settings from US to European number format. :-)
Thank you!
Felix
It was a problem regarding missing data replaced by mean in European number format - but i did not change the SmartPLS settings from US to European number format. :-)
Thank you!
Felix