In the Walk and Turn test, what does the 'D' clue indicate?

In the Walk and Turn test, the 'D' clue refers to the action of not touching heel to toe. This test is designed to assess a person's ability to walk in a straight line while following specific instructions, which includes walking heel to toe. A participant who fails to bring their heel to touch the toe of the opposite foot is exhibiting indicators of potential impairment. This particular clue signifies a lack of coordination or control, which can be contributing factors in evaluating a person's sobriety or ability to drive safely.

When conducting the test, each participant is typically required to take a series of steps forward, turn, and return in the opposite direction, maintaining the heel-to-toe position. Participants are closely observed for various clues of impairment, such as maintaining balance, using arms for support, or veering off the marked line. The failure to touch heel to toe aligns strongly with the overall goals of the test, as it reveals problems with balance and coordination, critical markers when assessing a person's fitness to operate a vehicle.