SFST Test Administration 4

Question 1

When using all three SFSTs together, what is the NHTSA-validated accuracy rate for identifying subjects at or above 0.08 BAC?

Accepted Answer

91%

Answer

73%

Answer

82%

Answer

98%

Question 2

Which phase of the Walk-and-Turn test evaluates the subject's ability to divide attention between mental and physical tasks simultaneously?

Accepted Answer

Both the instruction phase and walking phase

Answer

Instruction phase only

Answer

Walking phase only

Answer

Neither phase — WAT measures only balance

Question 3

During HGN testing, onset of nystagmus prior to 45 degrees is significant because it suggests:

Accepted Answer

A BAC likely at or above 0.08

Answer

The subject has naturally weak eye muscles

Answer

The officer moved the stimulus too slowly

Answer

The subject needs corrective lenses

Question 4

A properly standardized HGN exam consists of how many total passes of the stimulus in front of the subject's eyes?

Accepted Answer

8 passes

Answer

4 passes

Answer

6 passes

Answer

12 passes

Question 5

When the subject steps off the line during the Walk-and-Turn, the officer records a clue if the subject:

Accepted Answer

Steps any distance off the designated line

Answer

Steps one foot width off the designated line

Answer

Steps more than 3 inches from the designated line

Answer

Steps more than 6 inches from the designated line

Question 6

Which statement accurately describes the 'hopping' clue during the One-Leg Stand?

Accepted Answer

The subject uses small hops on the standing foot to maintain balance

Answer

The subject moves the raised foot up and down rapidly

Answer

The subject switches which foot is raised without instruction

Answer

The subject bends the standing knee repeatedly

Question 7

NHTSA recommends that officers practice SFSTs regularly to maintain proficiency. Which of the following best describes the purpose of this recommendation?

Accepted Answer

To ensure consistent, standardized administration that holds up in court

Answer

To allow officers to develop personal variations that improve accuracy

Answer

To enable officers to skip steps they deem unnecessary

Answer

To allow officers to estimate BAC without chemical testing