Hello Reseachgate community.
I have perused several recent sources to either find data or power tables missing and there I cannot seem to find the best source for an appropriate minimum sample size for a conditional process (moderated mediation) analysis.
With 4 variables (3 predictors, 1 outcome) and assuming power .80 with alpha .05 and small to medium effect sizes between all (i.e. 0.30) could anyone point me in the right direction please?
For complex mediation (path analytic) models, Monte Carlo simulation techniques are probably your best bet. See:
Thoemmes, F., MacKinnon, D. P., & Reiser, M. R. (2010). Power analysis for complex mediational designs using Monte Carlo methods. Structural Equation Modeling, 17(3), 510-534.
I offer a free mini-course on simulation of path models in Mplus that you can find here:
https://www.goquantfish.com/courses/sample-size-planning-in-mplus
Christian Geiser very much appreciate your input thanks, however, this is only for mediational designs and I have a moderator added into the mix to make it a CPA.
I reposted the question with more clarity here and the example table from Preacher et al. (2007):
www.researchgate.net/post/Help_with_a_priori_calculation_for_sample_size_in_a_first-stage_moderated_mediation_or_conditional_process_analysis?
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