SFSTs Flashcards
(33 cards)
If resting nystagmus is observed in the subject this may ne an indicator of what?
A medical condition
What is the maximum number of clues possible for HGN?
6
A good structured field sobriety test is simple and _____.
Divides the subjects attention.
The officers principal phase decision during detection phase one is usually _______.
Do I have sufficient grounds to stop the vehicle.
How many clues have been validated for the one leg stand?
4
How long should the subject stand with their foot raised for the one leg stand test.
30 seconds
Which of the following walk and turn clues can be scored in the instruction stage?
A. Stepping off the line
B. Missed heel to toe
C. Using their arms for balnce
D. Starts too soon
D, starts too soon.
When you are checking for lack of smooth pursuit during the HGN test, the stimulus should be moved at approximately how many seconds from the center to the side?
2 seconds
In the walk and turn test they have to take 9 steps up, how many must they take back?
9 steps
Of the following which is not a standardized field sobriety test?
A. Walk and turn
B. One leg Stand
C. Modified Rhomberger test
D. HGN
D. Modified Rhomberger
Detection phase 1 is called what?
Vehicle in motion
The SFST validation study that addresses the question, Do SFSTs discriminate at BAC levels below .10 is what?
San Diego - 1998
What is detection phase 2 called?
Personal contact
For you to count the vertical gaze nystagmus, it should be distinct and sustained for how many seconds?
4 seconds
What is the recommended position of the stimulus when checking HGN?
12-15 inches, and slightly above eye level
In the San Diego SFST validation study, which test was determined to be the most accurate when identifying a person with a BAC of .08 or higher
HGN
In the San Diego Validation study, the one leg stand was found to be what percent accurate?
83%
HGN is defined as what?
Involuntary jerking of the eyes occurring as the eyes gaze to the side
What are the 3 medical checks before we start HGN?
Equal pupil size, resting nystagmus, and equal tracking
The 2nd clue of HGN test is what?
Distinct and sustained nystagmus at max deviation
When you are checking for the onset prior to 45 degrees, the stimulus should be moved from the center line to the side in approximately how many seconds?
4 seconds
When you are checking for onset nystagmus prior to 45 degrees, once you see the nystagmus begin you should stop moving the stimulus and hold it steady to.
verify the jerking is continuing.
The walk and turn test has two stages, which are the ______.
Instruction stage and walking stage.
How many clues have been validated for the walk and turn test?
8
