Beyond the GUI
Power analyses can only be performed on group statistical maps.
Either paste a link to the online nifti-file
upload your statistical map.
Mask location (optional)
Upload a full brain mask or a Region-of-Interest mask. If no mask is selected, all non-null voxels are used.
Are the data Z- or T-values?
What is the screening threshold, also known as the clusterforming threshold or the excursion threshold (either p-value or z-value units)?
How many subjects does the group map represent?
Is this a one-sample or a two-sample test?
At which alpha-level are the statistical tests carried out?
Do you want to manually specify the smoothness or estimate from the data?
Note though that estimating smoothness on statistical maps leads to
. It is preferable to manually specify the data.
What is the smoothness of the data in mm?
What is the voxel size in mm?