BAC was measured 15 minutes after consumption of placebo (+25) and each alcohol drink (+ 70, +115, +160) and then at 45 min intervals (+205, +250, + 295) until the end of the session using an Alco-Sensor IV Instrument (Intoximeters Inc., St Louis, MO). BAC results were not viewable by the participant, and they were not informed of BAC results.