Which field sobriety test requires the suspect to take nine steps in a straight line?

The Walk-and-Turn test is designed to evaluate a suspect's balance, coordination, and ability to follow instructions, which are often impaired when someone is under the influence of alcohol or drugs. In this test, the individual is instructed to take nine heel-to-toe steps in a straight line, turn on one foot, and return back with nine more steps in the same manner. This specific series of tasks helps law enforcement officers assess both physical and cognitive function.

The test is structured so that it can reveal signs of intoxication, such as difficulty maintaining balance or failing to walk in a straight line. This is crucial in DWI cases, as it provides officers with observable evidence that supports the suspicion of impaired driving.

Other tests, such as the Horizontal Gaze Nystagmus test and the One-Leg Stand test, serve different purposes and assess different skills—like tracking eye movement or balance on one leg, respectively—while the Psychometric test is not recognized as a standard field sobriety test in DWI evaluations. Therefore, the Walk-and-Turn test specifically aligns with the requirement of taking nine steps in a straight line, marking it as the correct answer.