Size of the groups in PLS Multigroup analysis

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far51
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Size of the groups in PLS Multigroup analysis

Post by far51 » Fri Dec 15, 2017 4:14 pm

I would like to ask whether there are any conditions regarding the size of the groups for PLS-MGA. I have 70 observations in one group and 200 in the other. There is a huge difference between the two groups in terms of observations and I am not sure if this will affect the reliability of the analysis.

jmbecker
SmartPLS Developer
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Re: Size of the groups in PLS Multigroup analysis

Post by jmbecker » Fri Dec 15, 2017 9:39 pm

We know that it will affect the Permutation approach and therefore also Measurement Invariance testing. The other methods are supposed to be robust against unequal group sizes.
However, 70 observations might generally be too low for a reliable PLS analysis independent of a multi-group analysis.
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

far51
PLS Junior User
Posts: 2
Joined: Fri Dec 15, 2017 4:08 pm
Real name and title: FARHAN

Re: Size of the groups in PLS Multigroup analysis

Post by far51 » Wed Dec 27, 2017 2:16 pm

jmbecker wrote:We know that it will affect the Permutation approach and therefore also Measurement Invariance testing. The other methods are supposed to be robust against unequal group sizes.
However, 70 observations might generally be too low for a reliable PLS analysis independent of a multi-group analysis.
Dear Becker, thanks for your answer.

If I am right, SMARTPLS uses permutation approach only?
Would you kindly let me know what other methods can be used for multigroup analysis in PLS?
Moreover, how equal should be the sub-samples sizes for reliable permutation analysis?

jmbecker
SmartPLS Developer
Posts: 888
Joined: Tue Mar 28, 2006 11:09 am
Real name and title: Dr. Jan-Michael Becker

Re: Size of the groups in PLS Multigroup analysis

Post by jmbecker » Thu Dec 28, 2017 10:21 am

SmartPLS 3 offers you 4 different approaches (2 parametric approaches based on adapted t-tests and a non-parametric approach based on bootstrapping combined in the PLS-Multigroup Feature) and the Permutation approach.

See also
https://www.smartpls.com/documentation/ ... p-analysis
https://www.smartpls.com/documentation/ ... smartpls-3
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

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