Fig. 1.

Plots of grand averaged ERPs waveforms to congruent and incongruent trials for all children at session PRE, and children assigned to the trained and non-trained groups at sessions POST1 and POST2. The top row shows ERPs at channels located in anterior frontal (AF) positions and the bottom row shows EPRs at channels in fronto-posterior (Fcz/Cz) leads. Shadowed areas between conditions show areas of significant amplitude differences between congruency conditions (dark grey: p < .01; light grey: p < .05). Arrow heads point to post-target times (in ms) for which topographic maps of t-tests differences were created (shown in Fig. 2, Fig. 3).