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Factorial analysis testing for the interaction of age and modulator. (A) Cohort competition sensitivity for young and older adults (significant only for the younger group) and (B) Imageability sensitivity for young and older adults (significant only for the older group). (C) Interaction of age and modulator (cohort competition vs. imageability) in L IFG, shown as part of a whole-brain analysis (i) and plot of the peak significant voxel (ii).
