Dear all,
we have preprocessed (slice-time correction, realignment, MNI normalization, smoothing) the functional data of about 1000 people, each comprising 237 scans. Next, we would like to do a group ICA analysis on the smoothed data. Before that, however, we need to remove the influence of various nuisance variables (e.g., scanner site, age, sex) from the timeseries of each participant by using multiple regression and keeping only the residuals.
How can this be done using SPM?
Thanks in advance,
Maximilian
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