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Event‐related potentials (ERPs) during the training for cognitive training group (CTG; older). P300 amplitude difference (target minus nontarget) shown for channels Fz, Cz, and Pz and for the first (black curves) and middle sessions (red curves) (left three columns) and first (black curves) and last (red curves) sessions (right three columns) of 14 older adults of the CTG. Significance was measured using three‐way ANOVA (p < 0.01). Error bars indicate SEM
