Dear FSL users,
I am desperately looking for your advice…
I run auditory oddball task (target (rear), non target (frequent) and novel
sounds, response – button press for target rear sound). It’s an event related
design, sounds were presented randomly, inter stimulus intervals 1.8sec., no
off periods.
For fMRI data analysis the design matrix contains 6columns for timing of all
three different sounds and its time derivatives and motion parameters.
My question: Is the setting of the contrasts Target-Novel 1 -1;
Target-Nontarge 1 -1 and Novel – Nontarget 1 -1 correct or I should consider
target tones as a baseline?
Thank you,
Erica
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