Texas Commission on Law Enforcement (TCOLE) Practice Exam

The validated field sobriety tests include the one-leg stand, horizontal gaze nystagmus, and walk and turn tests, which are all recognized and standardized procedures for assessing possible impairment due to alcohol.

The one-leg stand test requires the individual to stand on one leg while counting to a specified number. This test evaluates balance, which can be impaired by intoxication.

The horizontal gaze nystagmus test assesses eye movement and the ability to track a stimulus smoothly. In individuals under the influence, there may be distinct signs of nystagmus, or an involuntary jerking of the eyes.

The walk and turn test involves walking heel-to-toe in a straight line and then turning around and walking back. This test examines coordination and the ability to follow directions, both of which can be affected by alcohol consumption.

Each of these tests has been validated through research and is widely used by law enforcement to determine whether an individual is impaired. Thus, the correct response encompasses all of these tests, confirming their validity in assessing sobriety.