at Pz for each subject in the GO condition and Cz for each subject in the NOGO condition, with manual adjustment of the peak locations as necessary. These peak latencies defined the 50 ms search window (±25 ms) for the other sites in each condition. Amplitude values were calculated as the average area around the peak (±25 ms), measured relative to the average voltage in the 100 ms pre-stimulus baseline at Fz, Cz, and Pz.
