Which of the following conditions can negatively affect the HGN test?

Which of the following conditions can negatively affect the HGN test?

• A. Well-lit environments
• B. Unfamiliar surroundings
• C. Poor weather conditions
• D. Seated positions

Answer: (C)

The condition that can negatively affect the HGN test is poor weather conditions. Adverse weather can create distractions or difficulties during the test, such as rain, snow, or wind, which may impact the ability to accurately perform the test and for the police officer to observe the nystagmus. For example, rain could obstruct vision or make it uncomfortable for the subject to focus, leading to unreliable results. Each of the other options does not significantly impair the ability to conduct the HGN test. Well-lit environments typically enhance visibility, allowing the officer to observe the eye movements more clearly. Unfamiliar surroundings might cause slight distractions, but they are not as impactful as severe weather conditions that could detract from the test’s integrity. Seated positions generally do not impede the test; instead, they can often facilitate better stabilization for the subject being tested. Therefore, poor weather conditions stand out as the factor that most adversely affects the HGN test's administration and accuracy.

The condition that can negatively affect the HGN test is poor weather conditions. Adverse weather can create distractions or difficulties during the test, such as rain, snow, or wind, which may impact the ability to accurately perform the test and for the police officer to observe the nystagmus. For example, rain could obstruct vision or make it uncomfortable for the subject to focus, leading to unreliable results.

Each of the other options does not significantly impair the ability to conduct the HGN test. Well-lit environments typically enhance visibility, allowing the officer to observe the eye movements more clearly. Unfamiliar surroundings might cause slight distractions, but they are not as impactful as severe weather conditions that could detract from the test’s integrity. Seated positions generally do not impede the test; instead, they can often facilitate better stabilization for the subject being tested. Therefore, poor weather conditions stand out as the factor that most adversely affects the HGN test's administration and accuracy.