A. Standard frontal repetition effects (at Fz electrode) in Location and Frequency waveforms across three windows (30–100 ms, 90–130 ms and 132–200 ms), for Younger (left) and Older (right) participants. Arrow indicates stimulus-onset. B. Line plots demonstrate repetition effect in aging across four repeat conditions (2, 6,12 & 22–23) in three time-windows (30–100 ms, 90–130 ms &132–200 ms).