For the one leg stand test, what is the minimum amount of time a subject is required to stand on one leg?

In the context of the one leg stand test, which is often used to evaluate a person's balance and potential impairment (commonly in DUI evaluations), the minimum amount of time a subject is expected to stand on one leg is typically set at 15 seconds. This duration is based on standardized practices designed to ensure a reliable assessment of an individual's balance.

Standing on one leg for this period allows the officer to observe physical indicators of impairment, such as swaying, using arms for balance, or putting a foot down. If a person can stand for this duration without exhibiting significant signs of imbalance, it typically suggests that their motor skills and balance are functioning within an acceptable range. The choice of 15 seconds is viewed as a balance between providing enough time to observe these indicators while also ensuring that the test remains practical and straightforward for law enforcement procedures.

The other options reflecting longer times (10, 20, and 30 seconds) either do not align with established protocols or would make the test longer than necessary for practical purposes in field situations.