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Hello SPM Users, I recently did a paired t test at the second level to look at the differences between two within-suibject conditions. I also attempted to do a one way within-subjects anova to compare the conditions; however I get slightly different results. The differences aren't huge (there's not completely different patterns of activation), but the cluster sizes especially are a little different and one of the clusters present in the ttest is not present in the anova. I was under the impression that a paired ttest with two conditions and a within-subjects anova with two conditions should yield the same results. Can anyone articulate for me why there might be differences between the two? I searched the SPM archives and it seems that when using the flexible factorial design for a within-subjects anova, some people get slightly different results than if they did a paired ttest. Does anyone know why? Thank you, Kailyn