SFST Test Administration 3

Question 1

During Walk-and-Turn instruction phase, what specific clue is recorded if the subject cannot maintain the heel-to-toe stance while listening to directions?

Accepted Answer

Loses balance during instructions

Answer

Loses balance during instructions is a distinct WAT clue counted when the subject breaks the instruction-phase stance before the test begins.

Question 2

NHTSA research indicates that the HGN test alone correctly classifies what approximate percentage of subjects at or above 0.08 BAC?

Accepted Answer

77%

Answer

NHTSA research shows HGN alone has approximately 77% accuracy in identifying subjects at or above the 0.08 BAC threshold.

Question 3

Which of the following is NOT a standardized clue for the Walk-and-Turn test?

Accepted Answer

Counts steps aloud incorrectly

Answer

Counting steps aloud incorrectly is not one of the eight standardized WAT clues; incorrect number of steps (taking wrong count) is the clue, not verbal counting errors.

Question 4

When administering HGN, the stimulus should be held how far from the subject's nose and slightly above eye level?

Accepted Answer

10–12 inches

Answer

NHTSA protocol specifies the stimulus should be 10–12 inches from the subject's nose and slightly above eye level to produce optimal nystagmus.

Question 5

A subject performing the One-Leg Stand raises their arms to maintain balance. At what height above the sides does this become a scored clue?

Accepted Answer

6 inches

Answer

Raising arms more than 6 inches from the sides of the body is the threshold for recording the 'uses arms for balance' clue in the OLS.

(SFST) Standardized Field Sobriety Testing Certified Practice Test

(SFST) Standardized Field Sobriety Testing Certified Practice Test

SFST Test Administration 3