What does the 'U' clue indicate in the Walk and Turn test?

The 'U' clue in the Walk and Turn test signifies that the individual uses their arms for balance while performing the task. This is critical in assessing a person's ability to maintain their balance and coordination during the test, which is designed to evaluate their physical and mental performance under the influence of alcohol or other substances. When a person uses their arms excessively, it indicates a lack of balance, which is a common characteristic of impairment. Observations such as this are essential for law enforcement officers conducting sobriety tests, as they contribute to the overall assessment of the individual's motor skills and cognitive functions.