Scalp levels.

<p><b>A, B,</b> Time-frequency charts of the difference between risky and save offers in human (<b>A</b>) and computer games (<b>B</b>). The upper panel shows differences in the overall power (dB) and the lower panel in strength of synchrony (inter-site-phase-clustering). <b>C, D</b> Inter-site-phase-clustering strength in alpha band (7–10 Hz) in safe (blue) and risky (red) offer in human (<b>C</b>) and computer (<b>D</b>) games. Areas represent the standard error of means. <b>E, F,</b> Difference between human and computer games in overall power (<b>E</b>) and synchrony (<b>F</b>). <b>A–F,</b> The non-significant areas are overshadowed and for each significant area, the scalp distribution of p-values is shown. Time-frequency charts and time line plots show the mean of the power or the sum of inter-site-phase-clustering strengths across all electrodes, and the topographic plots show the distribution of the significant time-frequency windows highlighted.