According to a San Diego study, the one leg stand is accurate ____ percent of the time for predicting if the subject is over a .08 blood alcohol concentration?

The one leg stand test is a common field sobriety test used by law enforcement to assess a person's balance and coordination, which can be impaired by alcohol consumption. According to studies, including the one conducted in San Diego, the effectiveness of the one leg stand in predicting whether a subject has a blood alcohol concentration (BAC) over the legal limit of .08 is statistically significant, showing an accuracy rate of approximately 83 percent. This high level of accuracy indicates that the test is robust in identifying impaired individuals, which aids officers in making informed decisions during traffic stops.

The effectiveness of the one leg stand test is derived from its reliance on physical coordination, which is often negatively impacted by alcohol. By determining this impairment, officers can assess the likelihood of a subject being legally intoxicated, thereby guiding subsequent procedures such as breathalyzer tests or arrest for driving under the influence.