Grouping participants based on the presence of oscillatory peaks. Here we show for both experiments (rows) and oscillatory bands (columns) the average (thick lines), and individual participant PSDs (thin lines) averaged over all trials for those who did exhibit oscillatory power (magenta) and those who did not (teal). For theta, we also observe group differences in both aperiodic exponent and offset, in which participants without theta oscillations typically have flatter spectra. These results apply to both experiments. *p < 0.05.