How many total clues can officers identify from the HGN test?

The correct answer states that officers can identify a total of six clues from the Horizontal Gaze Nystagmus (HGN) test. This test is designed to help officers assess a person's level of impairment due to alcohol or drugs by analyzing eye movements.

During the HGN test, officers look for specific indicators of impairment, which are categorized as clues. The six clues include the following:

1. Lack of smooth pursuit - The eyes do not move smoothly as they follow a moving object.

2. Distinct and sustained nystagmus at maximum deviation - This refers to involuntary jerking of the eyes when they are held at the farthest point to the side.

3. Onset of nystagmus prior to a 45-degree angle - This occurs when nystagmus is observed before the eyes reach 45 degrees to the side.

When these clues are present, they suggest that the individual may be impaired. The identification of all six clues allows officers to make a more informed assessment regarding a person's ability to safely operate a vehicle. The depth of analysis in this test is clinically supported and is an integral part of standard procedures to evaluate suspected impaired drivers.