In the context of HGN testing, what is a potential outcome of environmental distractions?

In the context of Horizontal Gaze Nystagmus (HGN) testing, environmental distractions can significantly hinder the subject's ability to focus on the test. HGN tests require the subject to maintain their gaze on a stimulus, such as a pen or an officer's finger, while the practitioner evaluates eye movement. If there are distractions in the environment, such as loud noises, visual stimuli, or other interruptions, they can interfere with the subject’s concentration and ability to respond appropriately during the test.

This distraction can lead to inconclusive or erratic results, as the subject may exhibit involuntary eye movements not solely attributable to alcohol or substance impairment. Therefore, maintaining a controlled and quiet environment is critical for accurately assessing the HGN indicators of impairment. This outcome underscores the importance of conducting the HGN test in settings that minimize distractions to ensure the reliability and validity of the results.