A 3-T Siemens Trio MRI system equipped for echoplanar imaging (repetition time = 2,500 ms, echo time = 30 ms, flip angle = 80°; 40 axial slices: matrix = 64 × 64, 3.5-mm3 resolution) was used. A high-resolution T1-weighted MP-RAGE (magnetization-prepared rapid gradient echo) anatomical volume (192 sagittal slices, matrix = 224 × 256, field of view = 224 × 256 mm2, slice thickness = 1 mm, no gap) was also collected for each participant. Stimuli were presented using a high-resolution rear-projection system (Avotec, Stuart, FL), and responses were recorded using a fiber-optic response pad (MRA Inc., Washington, PA). A computer running E-Prime (Version 1.1 SP3, Psychology Software Tools, Pittsburgh, PA) controlled stimulus presentation, which was synchronized with trigger pulses from the magnet.
