What is the significance of the phrase "heel-to-toe" during the Walk-and-Turn test?

The phrase "heel-to-toe" is significant during the Walk-and-Turn test because it specifically describes the precise placement of the feet during the performance of the test. Participants are required to walk in a straight line, placing the heel of one foot against the toe of the other foot with each step. This foot placement is crucial as it helps to evaluate balance, coordination, and the ability to follow instructions, which are all indicators of sobriety.

In this test, any deviations from the "heel-to-toe" position can indicate potential impairment, making this phrase central to the execution and assessment of the test. Proper adherence to this instruction helps ensure that the test reflects the individual's physical and mental abilities accurately while walking in a straight line.