WebThere are six possible clues that an officer can claim indicate impairment on the HGN test. (Three clues per eye) It only takes two clues out of the six possible to “fail” the HGN test. Observations that are not clues that officers sometimes score by mistake. Failure to maintain balance while taking the test. WebOn the Horizontal Gaze Nystagmus (HGN) test, a driver showing 4 of the 6 available clues would have a 77% chance of having a BAC equal to or greater than .10%. On the Walk and Turn (WAT) test, a driver showing 2 of the 8 available clues would have a 68% chance of having a BAC equal to or greater than .10%.
What Is Horizontal Gaze Nystagmus (HGN)? - Findlaw
WebIf the subject exhibits two clues out of a possible eight, the implication is that suspect’s BAC is above 0.08. The test is 68% accurate in detecting intoxicated individuals, in and of … Web9 Id., at VIII/1; See also Burns & Moskowitz, Psychophysical Tests for DWI Arrest, U.S. Dept. of Transportation Rep. No. DOT-HS-802-424 (1977) (recommended the three-test battery of one-leg stand, walk and turn, … is it shopify
How It Works/How To Challenge and Exclude It - NCDD
WebStandardized FST Clues 1. Horizontal Gaze Nystagmus (HGN); Six clues, three for each eye. There are no specific clues for vertical nystagmus. Clues: 1. Lack of smooth pursuit 2. Distinct and sustained nystagmus and maximum deviation 3. Angle of onset prior to 45 degrees 2. Walk and Turn (WAT); (8 total clues, 2 in instruction phase, 6 in ... Web1 apr. 2016 · NHTSA sponsored research of HGN testing has been based on the idea that if you see a specific number of clues on HGN, then you have a specific probability that the person’s blood alcohol level is greater than .04, .08, or .10. The research is not designed to assign a specific probability that a person is appreciably impaired. WebHGN Test Clue #1 Lack of Smooth Pursuit HGN Test Clue #2 Distinct and Sustained Nystagmus at Maximum Deviation HGN Test Clue #3 Onset of Nystagmus Prior to 45° Criterion for the HGN test 4 or more clues indicates a BAC level at or above .08%. How many stages are in the HGN test? There are 3 stages What are the stages of HGN test? … kettle cooked chips how are they made