Hi all,
I have a question regarding FSL operating in the funtional space. I understand all the first level analyses are carried out in the subject's space and that it is during the higher level analysis that the data gets resampled to the standard space.
Does this mean that if I am not going to run any higher level analysis and am interested in the data across the same subject for different runs in one session, I don't have to specify as standard space template in the registration tab of the FEAT gui? The way I am currently working is to use the brain extracted structural data collected during the same session as a substitute for the std space template and am leaving the "MainStructural" tab unselected.
Can anyone please address this and tell me if what I am doing is correct?
The second question I had was that pertaining to the predictors. I understand that the number of predictors in a first level analysis participating at a second level must be of the same number across all the subjects? If there are less predictors in one of them what do I do? I am thinking of putting a "0" for all time points for the extra predictor. Would this work? And if the number of predictors vary across runs for the same session, would this approach still be valid? Is it also necessary that all analyses that enter the second level have the same names for their predictors?
I would be very obliged if someone could kindly answer these questions.
Thank you.
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