Why do I get different t-values for paired samples t-test compared to post-hoc RM-ANOVA?
Using JASP, I ran a RM-ANOVA and performed post-hoc tests giving me t-values and corrected p-values (bonferroni). It also gives me a Cohen's d (uncorrected) for which I wanted to get 95% CIs. I did not see this option in the post-hoc tests, so I thought I would just do paired samples t-tests equivalent to my post-hoc tests and get the Chohen's d 95% CIs from this test. However, t-values and thus Cohen's d are different when testing with the paired samples t-test compared to post-hoc tests. I assumed that post-hoc with bonferroni only corrected p-values, but this is apparently not the case? Why do I get different t-values? And is there a way to get Chohen's d 95% CIs of my post hoc tests?
Thanks in advance!