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SFST Written Test Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
How many validated clues must be observed on the HGN test to indicate impairment?✔✔ Four out of six clues.
During the Walk-and-Turn test, how many steps must the subject take each way?✔✔ Nine heel-to-toe steps down and nine back.
What should the subject do if they lose balance during instructions?✔✔ Return to the starting position and follow the officer’s instructions.
How many clues are there in the Walk-and-Turn test?✔✔ Eight clues.
What is one clue of impairment in the Walk-and-Turn test?✔✔ Starting too soon before instructions are complete.
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How many validated clues must be observed in the Walk-and-Turn test to indicate impairment?✔✔ Two or more clues.
What is the main purpose of the Standardized Field Sobriety Test?✔✔ To help determine if a driver is impaired by alcohol or drugs.
Which three tests make up the SFST battery?✔✔ Horizontal Gaze Nystagmus, Walk-and-Turn, and One-Leg Stand.
What is nystagmus?✔✔ An involuntary jerking of the eyes that can indicate impairment.
What must an officer check before beginning the HGN test?✔✔ Equal pupil size and ability to track equally in both eyes.
How many total clues are possible on the HGN test?✔✔ Six clues, three in each eye.
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