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Revised adaptive semantic matching paradigm. (a) Accuracy, item difficulty, and reaction time on the revised semantic and perceptual control conditions in a second group of 16 neurologically normal participants. Perc = Perceptual. (b) Group analysis in this neurologically normal group. Whole brain activations were thresholded at voxelwise p < .005 then corrected for multiple comparisons at p < .01 based on cluster extent
