I have a scale variable, collected in 2 separated times, t1 (pre-test) and t2 (post-test).
My question is, must I use a repeated measures Anova, or can I use a basic Anova with only one factor: the difference between two values (t2-t1) ?
I have a scale variable, collected in 2 separated times, t1 (pre-test) and t2 (post-test).
My question is, must I use a repeated measures Anova, or can I use a basic Anova with only one factor: the difference between two values (t2-t1) ?