Upon arrival at the lab, participants read and signed an informed consent form, completed a number of questionnaires not relevant to this report, and were randomly assigned to one of the beverage conditions. Women self-administered a urine-stream pregnancy test (all were negative), and men also voided the bladder prior to continuing. Participants were escorted to a sound-proof recording chamber where baseline BrAC was taken, after which experimenters placed and tested recording electrodes. Next, participants completed practice trials as described previously. An experimenter (unaware of the true contents of the beverage) mixed (in view of participants) and served the beverage. After beverage consumption and the absorption period, a second BrAC was administered, along with the subjective intoxication items. Participants then completed the flanker task, stopping for a short break (~30 sec) between blocks. A longer break was given after blocks 3 and 7, during which BrAC was administered along with subjective intoxication items. After the remaining flanker trials, participants completed a few post-experimental questionnaires. Electrodes were then removed and participants were debriefed, after which control and placebo participants were dismissed. Alcohol group participants remained in the lab until a breathalyzer test indicated that they were sober (BrAC ≤ .02%).
