My research plan is as follows:
5 organisations are taking part in the project. Their employees will get a questionnaire in the beginning, middle and end (t1, t2, t3) of the project.
However, we will not be recording participant data, and so it is not fully longitudinal and more of a cohort study I believe, because we cannot tell whether the same people take part at each time point.
My plan was to do some type of multilevel model with participants nested within organisations, and to measure the effect of time on 3 outcome variables measured using the questionnaire.
Now a reviewer is asking for a sample size calculation to see how many people I would need to recruit for adequate power.
There are so many different programs (free or paid) as well as R packages that can do these types of analyses, and I am not quite sure what to pick. Any advice would be helpful!
Hello,
Your study is suitable for a simulation-based power analysis approach, leveraging packages like simr or powerlmm in R. These tools allow for the flexibility needed to model your specific study design and outcomes accurately.
Hope this helps
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