Multiattribute Modeling Analysis of the Effects of a Low Blood Alcohol Level on Pilot Performance

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Abstract
Multiattribute modeling procedures were used to evaluate the flight performance of pilots who completed a simulator flight under 0 and 0.04% blood alcohol concentration (BAC) conditions. The flight involved VOR tracking, vectoring, traffic avoidance, and descent. Flight instructors' judgments were used to develop a multiattribute model of flight performance that permitted evaluation of the effects of alcohol on overall flight performance, as well as on task segment and performance aspect components of the flight. Alcohol was found to have a significant deleterious effect on overall pilot performance and on some of the task segments. The multiattribute modeling approach was found to be useful in providing a task analysis function that permitted alcohol effects to be evaluated in a manner that reflected pilot concentration on some aspects of the flight task at the expense of others.

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