What must be done if a subject doesn’t understand the instructions for an SFST?

In administering Standardized Field Sobriety Tests (SFST), it's imperative to ensure that the subject fully understands the instructions given. If a subject indicates they do not understand the instructions, the appropriate action is to repeat or rephrase the instructions clearly. This is crucial because the validity of the test results hinges on the subject's ability to comprehend what is being asked of them. Misunderstandings can lead to poor performance on the tests not due to impairment but simply from a lack of clarity.

Ensuring clear communication fosters a fair testing environment and allows officers to accurately assess the subject's level of impairment based on their performance. This approach aligns with the principles of the SFST, which aim for consistency and reliability in assessing sobriety. As a result, repeating or rephrasing the instructions helps to eliminate ambiguity and ensures that the subject's performance is genuinely reflective of their abilities.