Hello SPM's users,
I was wondering whether you can help me understanding one crucial doubt.
I run a fMRI analysis on 3 groups by using a cognitive task. I first run a whole brain analysis that resulted in no significant results. Then I run a ROI analysis on specific region of interests and I found some significant effects.
Could you please help me understanding why I found nothing in a whole brain analysis and significant results in a ROI analysis?
Thank you very much,
Giuseppe
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