Sample size with repeated measurements

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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redlake
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Sample size with repeated measurements

Post by redlake »

Hi all,

I haven't found a suitable post in the forum, therefore my direct question:

What would you recommend as sample size if I apply repeated measures, i.e. a longitudinal study? I have three points in time, at which I applied the same questionnaire and established the same model. Do I have to treat all indicators and LV relationships as independent and therefore multiply the minimum sample size of the simple model by 3, or would you recommend the sample size from a simple, viz. one-time model?

thanks in advance,

matthias
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