I will have a 2X3 (pretest-posttest-follow up X experimental-control groups) split plot experimental design study, which is an RCT trying to test the effect of a group intervention on various variables. I want to see whether potential mediator variables say, a and b have mediated the effect of the intervention on the variable c. I will measure the potential mediators with the outcome for the three assessments. Does this design make sense and what kind of statistical procedures would you recommend? Advice on any introductory document, software as well as your answers would be very much appreciated.
Edit: I have previous experience on PROCESS macro for testing mediation on cross-sectional data, and am curious whether I can use it for this kind of experimental data.
Dear Chacon,
Thanks for the suggestion. I have accessed a copy of the book you referred. Unfotunately I am trying to find examples of mediation analysis as I described I could not find a relevant section for that. The book is predominantly concentratinf on medical studies. I had better look to more social science oriented sources with perhaps examples for SPSS or LISREL that I have some competence on.
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