Hi all,

I am trying to use G*Power 4 to compute the sample size that I will need to detect a 3-way interaction (2 x 2 x 2) in a mixed-effect ANOVA with 2 repeated-measures factors and 1 between groups factor.

Do I just add the two levels of the second repeated-measures factor to the number of measures input field?

Thanks for any advice you have,

Tom