How to calculate a 2*3*3 mixed repeated measures ANOVA using Gpower? Are there other, more appropriate methods for calculating sample size?

Our experimental design was a 2 (social value orientation: pro-social, pro-self) * 3 (grade: 4th, 5th, 6th) * 3 (peer comparison: fair distribution, mildly unfair, extremely unfair) repeated...

04 June 2024 8,849 0 View