Abstract
The purpose of this experiment was to investigate the effectiveness of a critical tracking task in discriminating drunken from sober subjects, in order to develop a simple and rapid psychomotor task for use in preventing drunken drivers from starting their vehicles. It is concluded that as B.A.C. increases, performance on a critical tracking task decreases and that the degree of degraded performance should be large enough for practical use in discriminating intoxicated from sober drivers.