Dear FSL users & experts,
I wanted to run a higher-level analysis using the contrast masking in the post-stats option. Simply speaking, I have three contrasts, C1, C2, C3. First, I want to mask C2 with C1 (C1 is the mask). I also want to mask C3 with C2 (C2 is the mask). The option “mask using z>0” was not selected.
The report file suggests that the setting was correct, as it says that “After all thresholding, zstat2 was masked with thresh_zstat1”, and “After all thresholding, zstat3 was masked with thresh_zstat2”.
Now, the problem is that, C2 was masked with C1 successfully, there was no problem with that. However, it does seem like C3 was masked with C2 because I saw voxels in C3 that were outside of C2.
Could you advise on what might be going wrong?
Many thanks in advance!
Best,
Haoyun
|