Which item is not one of the three standardized field sobriety tests?

• A. Horizontal gaze nystagmus
• B. Walk-and-turn
• C. One-leg stand
• D. Finger-to-nose test

Answer: (D)

The key idea is knowing which tests are part of the standardized field sobriety test (SFST) battery. The three tests that have been validated and routinely used are horizontal gaze nystagmus, walk-and-turn, and one-leg stand. Horizontal gaze nystagmus checks involuntary eye jerking as a person follows a moving object, which can indicate impairment. Walk-and-turn assesses balance, coordination, and the ability to follow instructions by having the subject walk a straight line, turn, and return. One-leg stand looks at balance and divided attention by measuring how well a person can hold a position while counting.

The finger-to-nose test isn’t one of these validated SFSTs. While it can assess coordination in some contexts, it isn’t part of the standardized battery, and its results aren’t tied to the same validated impairment indicators used in SFST.