Which other tests are commonly administered alongside HGN?

The Walk-and-Turn test and the One-Leg Stand test are commonly administered alongside the Horizontal Gaze Nystagmus (HGN) test as part of a standardized field sobriety testing process used by law enforcement. These tests are designed to assess a person's physical and cognitive abilities, which can be impaired by alcohol or drug consumption.

The Walk-and-Turn test requires the individual to walk a straight line, turn, and walk back in a specified manner, allowing officers to observe balance, coordination, and ability to follow instructions. The One-Leg Stand test has the individual stand on one foot for a specified duration and is used to evaluate balance and stability. These assessments complement the HGN test, which focuses on the eyes and provides an indication of potential impairment due to substances. Collectively, these tests help provide a more comprehensive evaluation of a person's sobriety.