Which of the following is a component of the standard field sobriety test?

• A. Blood test
• B. Eye test
• C. Hearing test
• D. Urine analysis

Answer: (B)

Field sobriety testing is about on-scene observations of impairment, not measuring exact chemical levels. A primary part of this evaluation is the eye tracking component, often called the horizontal gaze nystagmus test, where the officer checks for involuntary eye jerks as the person follows a moving object. This eye-based assessment helps indicate impairment in many cases because certain substances affect the nerves controlling eye movements. Blood tests and urine analyses require lab processing to measure chemical concentrations, so they aren’t part of the standard field sobriety battery, and hearing tests aren’t used in this context.