Operator performance as a function of drug, hypoxia, individual, and task factors.

Groups of 3 subjects received drug capsules, before and after overnight sleep. Alcohol and 12.000 ft. altitude treatments were introduced following initial, morning, task performance in a pressure chamber. Nine males performed under all experimental conditions which included appropriate alcohol and altitude controls. In a 3-hour post-treatment session, subjects rotated periodically among three tasks. The principal and surprising finding was the general lack of drug-alcohol effects on performance. A separate "Hangover" study revealed adverse effects of alcohol upon problem solving time.