What percentage of the time can the Walk and Turn test determine if a subject's BAC is above or below 0.08?

The Walk and Turn test is a standardized field sobriety test that has been shown to be effective in determining a subject's level of impairment, specifically in assessing whether a person's Blood Alcohol Concentration (BAC) is above the legal limit of 0.08. Research indicates that this test has a reliability rate of approximately 79%, meaning that it can correctly determine if a subject's BAC is above or below that threshold about 79% of the time. This level of accuracy is significant, as it allows law enforcement officers to make informed decisions during field sobriety testing.

The other options, while they suggest relatively high percentages, do not accurately reflect the established reliability of this particular test. Thus, the choice indicating 79% is the most correct, based on empirical studies that have evaluated the efficacy of the Walk and Turn test in DUI assessments.