afni.nimh.nih.gov

Hello. I have a question about the regress_censor_motion option in afni proc. In example 6 of the afni proc help, the motion threshold is set to 0.3. What is the appropriate unit of measurement for this threshold? Also, how does this relate to the statement in the explanation that says "censor TR pairs where the Euclidean Norm of the motion derivative exceeds 1.0." Thank you so much for the help!

Anthony