Participant movement was corrected/quantified using an analysis of head position based on rigid body translation and rotation. The data derived from the adjustments needed to realign head movement on a frame-by-frame basis were calculated as root mean square (RMS) values for translation and rotation in the x, y, and z planes in millimeters. Total RMS values were calculated on a run-by-run basis for each participant. Participants' BOLD runs with movement exceeding 1.5 mm root mean square were not included in the analysis. Movement was low across all subjects (Table 1).
