I've preprocessed my data elsewhere, and the program spits out motion parameters for translations (in mm) and rotations (in radians), which from what I've found is equivalent to what SPM does during motion correction. My question is how does the 1st level modeling differentiate between mm and radians when I supply the data as a regressor? Do I need to do any conversions, or are the data fine as is?
Thank you all for your help,
Kade
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