What skill does the One-Leg Stand test primarily assess?

The One-Leg Stand test primarily assesses physical coordination and balance. This test requires a person to stand on one leg for a specified period while counting aloud. By doing so, it provides insight into the individual's ability to maintain balance under conditions that may cause distraction or instability. This is crucial in DUI investigations as impaired individuals often struggle with tasks that necessitate good coordination and proprioception, which are affected by alcohol or drug use. The assessment focuses on the physical aspects of balance, which is relevant in determining sobriety.