Which of the following is NOT one of the three standardized field sobriety tests approved by the NHTSA?

The correct answer is the Finger-to-Nose Test (FTN) because it is not one of the three standardized field sobriety tests (SFST) officially recognized by the National Highway Traffic Safety Administration (NHTSA). The three approved tests are specifically designed and validated for assessing intoxication through measurable physical and cognitive functions.

The Horizontal Gaze Nystagmus (HGN) evaluates the eye's response to visual stimuli, while the Walk-and-Turn (WAT) assesses balance, coordination, and the ability to follow instructions as the individual walks heel-to-toe in a straight line. The One-Leg Stand (OLS) measures balance and the ability to maintain concentration while standing on one leg. Each of these tests has undergone rigorous research to establish their reliability and accuracy as indicators of impairment.

In contrast, the Finger-to-Nose Test, while it may be used informally by some law enforcement officers, is not part of the standardized set recognized by NHTSA and does not have the same level of scientific validation for determining sobriety.