Fig 2.

(a) Grand-average ERPs (128 electrodes) for each task (Single task ST, passive dual-task pDT and active dual-task aDT) when distractors were tones from 100 ms prior to picture onset to 100 ms before the verbal response and temporal distribution of the topographic patterns revealed by the spatio-temporal segmentation analysis. Stable electrophysiological configurations are color-coded. The white shaded area illustrates overlap between stimulus-aligned and response-aligned data as a function of grand-averaged production latencies for each task. (b) Map templates for the nine stable topographies observed from 100 ms prior to picture onset to RT-100. Positive (red) and negative (blue) values are displayed as well as maximal and minimal scalp field potentials. Correlations between map templates 7, 8, 9 and 10, 11 and 12 respectively are indicated. * indicate significant differences (p < 0.05) observed on any specific topographic pattern contrasting ST, pDT and aDT.