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The effects of dexamphetamine on 40 Hz power over time at electrode FCz. Both standard and rare stimuli are pooled in the analysis as there was no drug × stimulus type interaction. Displayed are the means and standard error of the mean. Dexamphetamine significantly increased 40 Hz power for both stimulation frequencies for all time bins except for the last 50–600 ms time bin. Holm-corrected p values: *p < 0.05, **p < 0.01; n = 44.
