Ethanol administration procedures were in accordance with established guidelines (NIAAA 2005). Infused ethanol was a solution of ethanol 6% (v/v) in 0.9% saline solution via a computerized pump (Braun Horizon NXT) to obtain a predetermined steady state (“clamped”) BrAc. Loading phase rate was determined using a MATLAB (1987) calculation, including participant sex, age, weight and height to generate linear ascension to target BrAc in approximately 20 min. After target BrAC was reached, the infusion pump rate was adjusted so that participants were maintained within ±5 mg% of target BrAc for 60 min. BrAc was measured every 2 min during the ascending phase and every 2-8 min during steady-state by Alcotest 7410-plus device (Dräger Safety AG & Co. KGaA, Lübeck, Germany). Self-reports of subjective response to ethanol were collected at +10, +30 and +60 min. after target BrAC was reached. For placebo infusion, IV bottles marked the same as those used for ethanol infusion were utilized. BrAC testing and pump alterations mirrored procedures used during ethanol test days. After the 60 min. period during which steady state BrAC was maintained using
