Abstract
In each of two independent experiments, four high extroverts and four lower extroverts drove an instrumental car through a closed pylon-defined course, on each of two experimental days after ingestion of alcohol and a placebo beverage, and with and without a concurrent mental loading task requirement. The direction and magnitude of the influences of alcohol upon tracking accuracy and control -use behaviour depended upon the particular controls observed, and was associated with driver personality and driver priorities concerning accuracy and speed. Results are given.