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Context

I ran an experiment with a two-factor within-subjects design (factor A with 3 levels (small, medium, large) and factor B two level (open, closed), so 6 test condition). 12 subjects have repeated 5 times each of the six test conditions (so 30 test per subject).

I tested for significance using a repeated measures ANOVA (and for significant main effects, I used Scheffé post-hoc tests).

Question

A reviewer asked me to provide power values for my ANOVA results. How i can calculate this values? I tried with:

  • G*Power: cannot do power analyses for repeated measures designs with more than one within-subject or between-subject factor;
  • R pwr.anova.test: only balanced one way ANOVA.
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  • $\begingroup$ You can use simulation ... $\endgroup$ – kjetil b halvorsen Oct 21 '16 at 11:55

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