How accurate is Sfst?

Using the SFSTs, the officers were extremely accurate in discriminating between BACs above and below 0.08 percent. Estimates at the 0.08 level were accurate in 91 percent of the cases, or as high as 94 percent if explanations for some of the false positives are accepted.

Table of Contents

What are the 6 clues of HGN?

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.

What are the clues for one leg stand?

while looking at your foot until instructed to stop. While performing this test, the officer will look for six possible clues: swaying, using arms for balance, hopping or putting your foot down. If the officer observes two or more clues, you will fail the test and can be arrested for drunk driving.

What is an HGN test?

The horizontal gaze nystagmus (HGN) test is one of the most common field sobriety tests in use today. Supposedly, it’s a “standardized” method of helping police officers determine when a suspect may have been drinking.

What is the most accurate SFST?

At the end of this study, the (3) most reliable field sobriety tests were determined to be Alcohol Gaze Nystagmus, Walk and Turn and One Leg Stand.

How many clues do you need in HGN?

Horizontal Gaze Nystagmus Test (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.

What is modified Romberg test?

The modified Romberg test, which has been shown to approximate computerized dynamic posturography (CDP) testing (2), shows promise as a screening test of vestibular-mediated balance function that predicts the clinically-important risk of falling during normal daily activities.

What is one minute one leg stand?

Standing on one leg is another common balance exercise: Stand with your feet hip-width apart and your weight equally distributed on both legs. Place your hands on your hips. Lift your left leg off the floor and bend it back at the knee (A). Hold the position as long as you can maintain good form, up to 30 seconds.