For each participant, the NCANDA release provided demographic information, Grooved Pegboard Test scores (Lafayette-Instrument 2002), measuring dexterity and eye-hand coordinated movement, and structural MRIs acquired in the sagittal plane on 3T Siemens Trio Tim scanners using a 12-channel head coil. T1-weighted MRIs were acquired using the gradient-echo MPRAGE sequence (TR = 1900ms, TI = 900ms, TE = 2.92ms, flip angle = 9°, matrix = 256×256, FOV = 24cm, slice dimensions = 0.9375×0.9375×1.2mm, 160 slices). T2-weighted MRIs were acquired using the spin-echo SPACE sequence (TR = 3200ms, TE = 404ms, variable flip angle, matrix = 512×512, FOV = 24cm, slice dimensions = 0.46875×0.46875×1.2mm, 160 slices, GRAPPA acceleration = 2).
