SFST EXAM STUDY GUIDE | STANDARDIZED FIELD SOBRIETY TEST CERTIFICATION
REVIEW QUESTIONS AND ANSWERS 2026/2027
San Diego Percentages - ANS ✔✔San Diego FST validation—NHSTA accurate
a. HGN was 88%
b. WAT 79%
c. OLS 83%
3 tests for possible DUI - ANS ✔✔1) Horizontal Gaze Nystagmus (HGN)
2) One Leg Stand (OLS)
3) Walk and Turn (WAT)
Most reliable FST - ANS ✔✔Horizontal Gaze Nystagmus
NHTSA 3 Phases - ANS ✔✔Phase 1: Vehicle in motion
- Stop the car?
Phase 2: Personal Contact
- SFST testing?
Phase Three: Pre-arrest Screening
- Arrest?
Common symptoms of alcohol influence - ANS ✔✔A. .03 slowed Reaction
B. .05 Impaired Judgement
C .08 Impaired vision
D. .10 Poor coordination
Horizontal Gaze Nystagmus (HGN)-Steps and Clues - ANS ✔✔3 clues per eye-IN ORDER *(4 min)*
1. Lack of smooth pursuit
2. Distinct and sustained nystagmus at maximum deviation
3. Onset of nystagmus prior to 45 degrees
One Leg Stand (OLS)--Two Stages - ANS ✔✔I. Instructions Stage
1. Stand straight, feet together
2. Keep arms at sides
3. Maintain position until told otherwise
--
II. Balance and counting stage.
1. Raise either leg
2. Keep raised foot approx. 6 in off ground, and keep both legs straight and arms at your side
One Leg Stand (OLS)--Clues - ANS ✔✔4 clues-*2 MINIMUM*
1. Puts foot down.
2. Uses arms to balance
3. Sway while balancing
4. Hopping
[P.U.S.H]
REVIEW QUESTIONS AND ANSWERS 2026/2027
San Diego Percentages - ANS ✔✔San Diego FST validation—NHSTA accurate
a. HGN was 88%
b. WAT 79%
c. OLS 83%
3 tests for possible DUI - ANS ✔✔1) Horizontal Gaze Nystagmus (HGN)
2) One Leg Stand (OLS)
3) Walk and Turn (WAT)
Most reliable FST - ANS ✔✔Horizontal Gaze Nystagmus
NHTSA 3 Phases - ANS ✔✔Phase 1: Vehicle in motion
- Stop the car?
Phase 2: Personal Contact
- SFST testing?
Phase Three: Pre-arrest Screening
- Arrest?
Common symptoms of alcohol influence - ANS ✔✔A. .03 slowed Reaction
B. .05 Impaired Judgement
C .08 Impaired vision
D. .10 Poor coordination
Horizontal Gaze Nystagmus (HGN)-Steps and Clues - ANS ✔✔3 clues per eye-IN ORDER *(4 min)*
1. Lack of smooth pursuit
2. Distinct and sustained nystagmus at maximum deviation
3. Onset of nystagmus prior to 45 degrees
One Leg Stand (OLS)--Two Stages - ANS ✔✔I. Instructions Stage
1. Stand straight, feet together
2. Keep arms at sides
3. Maintain position until told otherwise
--
II. Balance and counting stage.
1. Raise either leg
2. Keep raised foot approx. 6 in off ground, and keep both legs straight and arms at your side
One Leg Stand (OLS)--Clues - ANS ✔✔4 clues-*2 MINIMUM*
1. Puts foot down.
2. Uses arms to balance
3. Sway while balancing
4. Hopping
[P.U.S.H]
