Hi FSL users and experts,
I'm finding too much activation for one contrast in one subject. I ran a first-level analysis to assess differences between two time points (E1 and E2). The poststats report revealed virtually no activation for E1 v Baseline (not too surprising), but the complete opposite for E2 v Baseline across the whole brain. E2 v E1 is worse, with nearly the entire brain showing activation. A few things are worth noting:
1) There are 4 trials that are modeled for each event.
2) This exact contrast was used for 26 other subjects, and twice more for different contrasts for this subject and did not reveal this problem.
3) Registration is good.
4) The onset files look fine, and after running the first-level analysis on this contrast again, the same issue arose.
There appears to be some motion that occurs around the time points of these events, but I'm doubtful whether that's the cause. Any help/advice would be greatly appreciated!
Kaitlyn
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