The 3 field sobriety tests are the horizontal gaze nystagmus (HGN) test, the one-leg stand test (OLS), and the walk-and-turn test (WAT). These tests are designed to assess a person's level of intoxication by measuring coordination, balance, and the ability to divide their attention. The HGN test measures the quick, involuntary eye movements that occur when the eyes are rotated. The OLS and WAT tests are divided attention tests that require the person to follow instructions, perform physical tasks while maintaining balance, and count steps.
September 22, 2024