Dear FSL experts
I am a brand new FSL user. I run a blocked Stroop task with fMRI, and I
have previously analysed some of my data using SPM. I am trying to learn
using FEAT and unfortunately I'm getting stuck at very preliminary
stages.. Can someone please help?
I'll explain my paradigm and what I have been entering in the GUI so
far..
My TR is 3 seconds
I have 118 functional images per subject.
The blocked Stroop task I use is set up as follows:
Rest (16sec) - Neutral condition (40sec) - Rest (16sec) - Congruent
condition (40sec) - Rest (16sec) - Incongruent condition (40sec) - Rest
(16sec) - Incongruent condition (40sec) - Congruent condition (40sec) -
Rest (16sec) - Neutral condition (40sec)
I have several questions:
1) Does that make my design rA-rB-rC-rC-rB-rA?
2) Is my 'high pass filter cutoff' = r+A+r+B+r+C (16+40+16+40+16+40) =
168sec?
3) My data is acquired with interleaved order but for a blocked design
like mine, do I need to use slice time correction? (I know I don't tick
that option in SPM).
4) I struggled with setting up a full model despite reading the
instructions on FSL webpage. According to the information I supplied
above, do I have 3 or 6 EVs? as I have a repetition of each condition as
described above.
I greatly appreciate your time and advice.
Kind regards
Reem
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