Dear colleagues,
I am interested in activation differences between two conditions
(contrasts active > baseline, baseline > active). For that, I used an
one-sample t-test and a threshold of p=0.001 at the voxel level, p<0.05
at the cluster level. Now someone has correctly pointed out that I use a
typical one-tailed threshold for a two-tailed test. What threshold do I
have to use? Do I just have to correct the cluster level threshold,
i.e., p=0.001 at the voxel level, p<0.025 at the cluster level for each
of the two contrasts?
Best wishes Andreas
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