SFST Certification Exam Prep Flashcards
What are the 3 SFST tests in order which they are administered?
The 3 SFSTs are:
1) Horizontal Gaze Nystagmus (HGN)
2) Walk and Turn (WAT)
3) One Leg Stand (OLS)
What is the definition of Nystagmus?
Nystagmus is the involuntary jerking of the eye
What is the definition of HGN?
HGN is the involuntary jerking of the eye, occurring as the eyes gaze to the side
What are the 2 components of HGN?
The 2 components of HGN are:
1) Medical Assessment
2) Alcohol Assessment
What are 3 validated clues for HGN?
The 3 validated clues for HGN are:
1) Lack of Smooth Pursuit
2) Distinct and Sustained Nystagmus at Maximum Deviation
3) Onset of Nystagmus Prior to 45º
How many total clues are possible for HGN testing?
6 total, possible clues for HGN (3 each eye)
How many HGN clues are needed for recommending arrest?
At least 4 of 6 possible HGN clues are needed for recommending arrest
What BAC is associated with Lack of Smooth Pursuit?
.04 or higher BAC is associated with Lack of Smooth Pursuit
What BAC is associated with Distinct and Sustained Nystagmus at Maximum Deviation?
.08 or higher BAC is associated with Distinct and Sustained Nystagmus at Maximum Deviation
What BAC is associated with Onset of Nystagmus Prior to 45º?
.10 or higher BAC is associated with Onset of Nystagmus Prior to 45º
What are 2 Divided Attention Test?
The WAT and OLS are 2 Divided Attention Tests
What are the stages of WAT?
The 2 stages of WAT are?
1) Instruction Stage
2) Walking Stage
How many clues are possible in the First Stage of the WAT and name the clues?
2 clues are possible in the WAT Instruction Stage:
1) Starts Too Soon
2) Cannot Maintain Balance
How many clues are possible in the Second Stage of the WAT and name the clues?
6 clues are possible in the WAT Walking Stage (S.H.O.R.T.S.):
1) Stops off the line
2) Heel to toe - does not touch H2T
3) Off line - steps off line
4) Raises arms for balance
5) Turns improperly - loses balance turning
6) Steps - wrong number of steps
How many clues are needed for arrest in WAT and what is the associated with BAC?
2 or more clues in the WAT are needed for arrest and are associated with .08 BAC
What are the stages of OLS?
There are 2 stages of the OLS:
1) Instruction Stage
2) Balance and Counting Stage
How many clues are possible in the First Stage of the OLS and name the clues?
0 (zero) possible clues in the Instruction Stage of the OLS
How many clues are possible in the Second Stage of the OLS and name the clues?
There are 4 possible clues in the Balance and Counting Stage of the OLS (P.U.S.H.):
1) Puts foot down
2) Uses arm(s) for balance
3) Sways
4) Hopping
How many clues are needed for arrest in OLS and what is the associated with BAC?
2 or more clues in the OLS are needed for arrest and are associated with .08 BAC
Define Divided Attention Test
A Divided Attention Test: Concentrating on more than one thing at a time (mental tasks and physical tasks)
What type of alcohol is found in alcoholic beverages?
Ethanol is the type of alcohol found in alcoholic beverages
What is the “illegal per se” law?
The “illegal per se” law makes it an offense to operate a vehicle while having a statutorily prohibited BAC
A good, structured field sobriety tests is:
A good, structured field sobriety test is simple and divided the subject’s attention
What is the difference in Clue and Cue?
Clue: What officer test for?
Cue: What officer observes; Officer does not test for cues
What are the Phases of DUI detection?
There are 3 Phases of DUI detection:
1) Phase 1: Vehicle In Motion
2) Phase 2: Personal Contact
3) Phase 3: SFST
In Phase 1 of DUI Detection, what is the principal question for the officer?
The principal question for the officer in the Vehicle In Motion Phase (Phase 1) of DUI Detection is:
Should I stop?
How many total cues are there in Phase 1 of DUI detection?
There are 30 possible cues in the Vehicle In Motion Phase of DUI detection (24 prior to command to stop; 6 after command to stop)
In Phase 2 of DUI Detection, what is the principal question for the officer?
The principal question for the officer in the Personal Contact Phase (Phase 2) of DUI detection is:
Should I instruct the driver to exit the vehicle?
How many total cues are there in Phase 2 of DUI detection?
There are 28 possible cues in the Personal Contact Phase of DUI detection (12 cues from sight; 5 cues from hearing; 4 cues from smell; 7 cues from exit from vehicle)
In Phase 3 of DUI Detection, what is the principal question for the officer?
The principal question for the officer in the SFST Phase (Phase 3) of DUI Detection is:
Should I arrest?
The arrest decision is based on _____________ ?
The arrest decision is based on all evidence obtained during all three detection phases
List SFSTs in order of reliability and provide percentage of reliability per San Diego field validation study
The most reliable SFST is HGN (88% reliable);
The OLS is more reliable (83% reliable) than the WAT (79% reliable)
What is the most important instruction in administering a PBT?
When administering a Preliminary Breath Test, Do not permit the subject to put ANYTHING in their mouth for at least 15 to 20 minutes prior to testing
Name the 8 typical stimulus capabilities required for driving?
The 8 typical stimulus capabilities required for driving are:
1) Information Processing
2) Short-term memory
3) Judgment and decision making
4) Balance
5) Steady, sure reations
6) Clear vision
7) Small muscle control
8) Coordination of limbs
