Prior to statistical analysis, the first four volumes of each run were discarded to allow the MR signal to reach steady state. The remaining images in each participant’s time series were motion-corrected, spatially smoothed with a 3-D Gaussian kernel (full width at half maximum = 7 × 7 × 7 mm3), and high-pass filtered using FSL, the Software Library of the Oxford Centre for Functional Magnetic Resonance Imaging of the Brain (FMRIB; Version 3.1; http://www.fmrib.ox.ac.uk/fsl).
