One-Way Anova Repeated Measures: Main effect is significant, but post-hoc tests are not significant

Posted by JohnDoe on Jan 02, 2014; 4:35pm
URL: http://spssx-discussion.165.s1.nabble.com/One-Way-Anova-Repeated-Measures-Main-effect-is-significant-but-post-hoc-tests-are-not-significant-tp5723746.html

Hi,

I ran a one-way within-subjects ANOVA, with equal group sizes, and my data met the assumption of sphericity. I found a significant Main effect, but Bonferroni's tests did not reveal any significant post-hoc effects.

Does anyone know why this might have happened? And how would I report this result?

Thanks very much