I am following this nilearn tutorial about doing second level analysis but I don’t understand the point of height_control='fpr'. The maps thresholded_map(height_threshold=None) and thresholded_map1(height_control=fpr) are identical. Does fpr correct for multiple comparisons at all?
These two maps in the tutorial are meant to be the same. thresholded_map is based off of z-score, and thresholded_map1 is based off an alpha level (which corresponds to the same z-score in the other map). These maps are thresholded to control for the false positive rate of the test.
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