What factor is assessed in the Walk-and-Turn test?

The Walk-and-Turn test is specifically designed to assess balance and coordination as a means of evaluating a person's ability to perform tasks that require physical control and stability. During this assessment, an individual is instructed to take a series of steps in a straight line, which demonstrates their ability to maintain balance while walking. If a person has difficulty with this task—by swaying, losing their balance, or not following the instructions correctly—it may indicate impairment typically associated with alcohol or drug influence.

While clarity of speech, cognitive ability to follow directions, and driving history can be relevant in different contexts of DUI assessments, they are not the primary focus of the Walk-and-Turn test. The main goal of this test is to observe the individual's physical responses—specifically, how well they can navigate the walking exercise, which directly reflects their coordination and balance.