Hi,
Please refer me to longitudinal studies that also used multi groups. I am trying to do a study using 2 groups and collected data during 2 different time points. I am looking for example studies to make sure what I am doing is correct.
Any help will be much appreciated.
Thank you.
Longitudinal and multi group studies
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- SmartPLS Developer
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- Real name and title: Dr. Jan-Michael Becker
Re: Longitudinal and multi group studies
I'm not aware of longitudinal studies that use PLS-MGA. The problem is that PLS-MGA assumes independence of the groups. However, in a longitudinal setting groups are not independent, just like in a paired t-test.
If you have strictly paired data, I would rather model both time points in the same model (maybe even including autoregressive effects).
If you have strictly paired data, I would rather model both time points in the same model (maybe even including autoregressive effects).
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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Re: Longitudinal and multi group studies
Thank you very much Dr. Becker.
What you said makes sense. I did as you said and put both time points within the same model. To test difference between the 2 groups do I just look at p-value (condition 1 Vs condition 2) in the PLS-MGA or parametric test?
-Shamila
What you said makes sense. I did as you said and put both time points within the same model. To test difference between the 2 groups do I just look at p-value (condition 1 Vs condition 2) in the PLS-MGA or parametric test?
-Shamila
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- SmartPLS Developer
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- Joined: Tue Mar 28, 2006 11:09 am
- Real name and title: Dr. Jan-Michael Becker
Re: Longitudinal and multi group studies
If you have everything in one model you can test parameters in t1 vs. t2 with the following approach
Rodríguez-Entrena, M., Schuberth, F., & Gelhard, C. (2018). Assessing statistical differences between parameters estimates in Partial Least Squares path modeling. Quality & quantity, 52(1), 57-69.
Rodríguez-Entrena, M., Schuberth, F., & Gelhard, C. (2018). Assessing statistical differences between parameters estimates in Partial Least Squares path modeling. Quality & quantity, 52(1), 57-69.
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
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- Real name and title: Mrs. Shamila J
Re: Longitudinal and multi group studies
Thank you very much Dr. Becker.
In this paper they talk about using MS Excel "in order to manually calculate the parameter difference for
every bootstrap sample" (p.63). I used SmartPLS 3.0 hence I think this operation is completed by the software itself. Correct me if I am wrong.
-Shamila
In this paper they talk about using MS Excel "in order to manually calculate the parameter difference for
every bootstrap sample" (p.63). I used SmartPLS 3.0 hence I think this operation is completed by the software itself. Correct me if I am wrong.
-Shamila
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- PLS Junior User
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- Real name and title: Melvin Prince
Re: Longitudinal and multi group studies
What about running the same model independently for t1 and t2? Then use the latent variable scores (or the unstandardized ones from IPMA) for partial least squares regressions in the structural model. Is this ok? Is there a literature that provides support or context?
Melvin Prince
Melvin Prince