When FSL analyzes paradigm file for a given fMRI run, how does it analyze it?
For example, if I have five different EVs (A - E):
TRs A B C D E
0 0 0 0 0 0
1 0 0 0 0 0
2 1 0 0 0 0
3 1 0 0 0 0
4 0 0 0 0 0
5 0 0 0 0 0
6 0 1 0 0 0
7 0 1 0 0 0
8 0 0 0 0 0
9 0 0 0 0 0
10 0 0 1 0 0
11 0 0 1 0 0
12 0 0 0 0 0
13 0 0 0 0 0
14 0 0 0 1 0
15 0 0 0 1 0
16 0 0 0 0 0
17 0 0 0 0 0
18 0 0 0 0 1
19 0 0 0 0 1
and I want to only look at condition A: I would set the contrast to
Contrast EV(A) EV(B) EV(C) EV(D) EV(E)
A 1 0 0 0 0
1) Now, does FSL looks at condition A and compare it with the average of all other conditions (B-E)?
OR
2) does FSL looks at condition A and compare it only to those TRs that have zeros (e.g. baseline) across all five EVs? That is, it is modeled only against our baseline condition, and not against blocks of other conditions.
Thank you for your help.
