What is a common field sobriety test used to measure coordination?

The one-leg stand test is commonly used to measure coordination as part of field sobriety testing. During this test, the individual is asked to stand on one leg for a specified duration, usually 30 seconds, while counting out loud. This task requires balance and coordination, which are often affected by alcohol impairment. The ability to maintain balance on one leg while listening and responding verbally reflects the motor skills and cognitive function of the person being tested.

The test is specifically designed to evaluate the subject's ability to handle the physical demands of standing while also processing instructions and keeping count, showcasing how well they can coordinate their movements. This type of assessment is critical for law enforcement when determining whether a person might be driving under the influence. Other tests mentioned may assess different aspects of balance or coordination but do not focus on the same dynamic of standing balance while engaging in a secondary task, making the one-leg stand test a reliable indicator of impaired coordination.