Which test requires the subject to stand on one leg for a specific duration?

The One-Leg Stand test is specifically designed to assess a subject's balance and coordination as part of standardized field sobriety testing. During this test, the subject is instructed to stand on one leg for a predetermined period, typically 30 seconds, while keeping the other leg raised approximately six inches off the ground. This evaluation helps determine if the individual has impaired motor skills, which could indicate alcohol or drug consumption.

The nature of the test focuses on both balance and attention, as the person must maintain their stance while counting out loud. Successful performance requires not only physical stability but also cognitive function, as individuals under the influence are often unable to concentrate properly or maintain their balance.

While the Walk-and-Turn test, Horizontal Gaze Nystagmus test, and Finger-to-Nose test are also utilized in field sobriety assessments, they each measure different skills or reactions and do not specifically require balancing on one leg for an extended duration like the One-Leg Stand test does.