Which of the following is NOT one of the clues indicated in the performance phase of the walk and turn test?

The clue that is not associated with the performance phase of the walk and turn test is the requirement to "fail to smile throughout the test." The walk and turn test is designed to assess an individual's balance, coordination, and ability to follow instructions, primarily focusing on their physical performance during the tasks. The specific criteria observed during this test include starting too soon, stopping while walking, and using arms for balance, as these behaviors can indicate impairment or difficulties with coordination.

Smiling or any specific facial expression is not a factor that is considered in the context of this test. The performance phase relies strictly on the actions taken during the walking and turning tasks, rather than the demeanor or expressions of the individual being tested. This distinction is essential for accurately interpreting the results and assessing the individual's physical capabilities in relation to driving under the influence or other scenarios where coordination is critical.