MICOM

Questions about the implementation and application of the PLS-SEM method, that are not related to the usage of the SmartPLS software.
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Saadia
PLS Junior User
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Joined: Fri Mar 17, 2017 2:32 pm
Real name and title: Ms. Saadia Shabnam

MICOM

Post by Saadia »

Hi
Good day.
I am using SmartPLS 3. Before running PLS-MGA, ran permutation test and got MICOM output (Henseler et al, 2016). From stage 2, when result is showing 'no' compositional invarience, how to treat it and proceed for MGA ?
Can any indicator level change (omitting certain indicator from constructs which is showing no compositional invarience)?
Quoting from Henseler et al, 2016-
" lack of compositional invariance implies that the scores obtained through group-specific model estimations differ from the scores resulting from the pooled data (no measurement invariance established). Researchers should only analyze and interpret the group-specific model estimations separately."

Any clarification on this? any other resource please?

Thanks in anticipation.
Saadia
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cringle
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Real name and title: Prof. Dr. Christian M. Ringle
Location: Hamburg (Germany)
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Re: MICOM

Post by cringle »

Are you sure that you did not establish compositional invariance? This is not the case, when the original correlation is below the 5% lower bound. Otherwise compositional invariance has not been established.

When compositional invariance has not been established, you cannot tell if the group-specific differences are significant (e.g., by permutation or PLS-MGA). But you can qualitative discuss the differences. Alternatively you can try solving the problem by analyzing a reduced model that does not include the problematic constructs.

Best
Christian
sling
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Joined: Fri Jan 19, 2018 8:54 am
Real name and title: Lintje Sie

Re: MICOM

Post by sling »

Hi Prof Ringle,
Just to follow above conversation, my result of MICOM analysis showed compositional invariance (step 2 established) but step 3 did not achieve (unequal mean values and variances). Does it mean I should only analyze and interpret the group-specific model estimations separately? For your immediate advice, please. Thanks.

Best regards,
Lintje
jmbecker
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Real name and title: Dr. Jan-Michael Becker

Re: MICOM

Post by jmbecker »

If you have established compositional invariance (step 2) you can use the MGA or permutation approach to assess the significance of the difference. However, you should not combine the groups and assess the overall (combined) sample.
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
MariaLunde
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Real name and title: Maria Lunde

Re: MICOM

Post by MariaLunde »

Hi,

What do you mean with "Combine the groups and assess the whole sample"? For example, can we run multigroup analysis for one variable with four categories?

I am really looking forward to your reply:)

kind regards,
Maria
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