HGN Cues/Clues of Intoxication
There are a total of
three clues
that can be assessed in this test: lack of smooth pursuit, distinct nystagmus at maximum deviation, and the onset of nystagmus prior to 45 degrees. Each eye is scored independently for three clues in each eye giving a total of six indicators/cues.
How many clues do you need for Walk and Turn?
There are
eight clues
associated with the walk and turn test. Two can be assessed in the “instructional stage” (starts too soon, looses balance) and the remaining six in the” walking stage” (misses heel to toe, steps off line, uses arms to balance, stops while walking, too many steps, improper turn).
How many clues do you need for HGN?
The officer checks for three clues in each eye, which gives
six clues
for this test. The clues are: lack of smooth pursuit of the eyes, distinct and sustained nystagmus at the eyes' maximum deviation and nystagmus starting before the eyes reach 45 degrees.
How many clues do you need for Sfst?
There are a total of
8 clues
the officer is looking for. The police officers are taught that if the person demonstrates 2 or more clues on this test or fails to complete it, then there is a 68% accuracy in determining the suspect's blood alcohol content is above 0.10.
What are the 8 clues in the walk and turn test?
The eight clues the officer will be looking for are:
not keeping your balance while listening to instructions
, starting the test before you are instructed to begin, not touching your heel to your toe, stepping off the line, stopping while walking, using your arms for balance, making an improper tum, and taking more or …
Can you ask for a Breathalyzer instead of a field sobriety test?
Police can't force you to take a breathalyzer
, and the portable ones are just an indicator. When combined with a field sobriety test it can lead to probable cause to make the arrest. All by itself it's not enough.
What do cops look for in a field sobriety test?
Field Sobriety Tests are groups of three tests used by police to determine if a driver is impaired. … The
tasks assess balance, coordination, and the ability of the driver to divide his attention to more than one task
during the field sobriety test.
What are the 4 clues for the one leg stand?
The indicators include the following:
(1) putting your foot down before the test is completed
; (2) swaying while trying to maintain your balance; (3) hopping while trying to maintain your balance; and (4) using your arms to help maintain your balance.
What is the one leg stand test?
The one leg stand test requires
the tested person to stand on the leg of their choosing
, raise the other leg up in front of them approximately 6 inches off the ground while keeping both legs straight.
What is the most accurate sobriety test?
NHTSA studies have shown that
the HGN test
has a 77 percent accuracy rate in detecting blood alcohol concentrations of . 10 percent or higher. The HGN test is often considered the most accurate field sobriety test, however there are often issues with how the test is conducted that can later be challenged in court.
How accurate is a field sobriety test?
They have published several training manuals associated with FSTs. As a result of the NHTSA studies, the walk-and-turn test was determined to
be 79% accurate
, and the one-leg stand test is 83% accurate when administered to people within the study parameters and confirming with a BAC at or over 0.08.
Can you refuse a field sobriety test?
Individuals can refuse to take field sobriety tests
. There are pros and cons to doing so. When a person is stopped for suspected intoxicated driving, the police officer will often try to convince them to comply with the request for field sobriety tests. … They are simply building a case to arrest the individual.
What are the 3 field sobriety tests?
The Horizontal Gaze Nystagmus Test, Walk & Turn Test, and The One-Leg Turn Test
are currently the only three standardized field sobriety tests.
What is modified Romberg test?
The Modified Romberg Balance Test begins with
the officer instructing the subject to tilt his or her head back slightly, close his or her eyes, and estimate 30 seconds
. When he or she believes 30 seconds has gone by, the subject is supposed to tilt his or her head forward, open his or her eyes, and say “stop.”
What is the lack of convergence test?
Lack of Convergence Test
After the HGN, the
LOC test
uses the same stimulus as used in the HGN. The test requires the person to, once again, simply watch the “stimulus” that is held 12-15 inches from the subject's nose and the stimulus is moved in two large circles in either a clockwise or counter-clockwise motion.
