Hi Alfonso,

Thank you so much for your detailed clarification! I'm aware of the difference in the order of preprocessing steps and I agree with the potential implications that you've raised. In BrainVoyager, however, the default sequence involves slice-timing correction before realignment. From what I've read, it seems appropriate to perform slice-timing correction first (probably more for an event-related design than a blocked design) if the TR is greater than 2s and if the scanning sequence is interleaved.

To what extent of in-scanner motion is considered low, in your opinion? For my current data, I used thresholds of 3SD for the deviation from the global mean signal and 1 mm for the composite subject motion (supposedly a combination of 1 mm for translational displacement and 0.2 rad for rotational displacement). My subsequent threshold for subject exclusion is 20% of volumes are outliers. Is that conservative enough?

Thanks!

Best,
Darren