Which principle does the SFST adhere to for consistency and reliability?

The principle of standardization is central to the Standardized Field Sobriety Test (SFST) because it ensures that the tests are conducted in a consistent manner across different individuals and situations. This means that the same procedures, instructions, and criteria are used every time an SFST is administered, allowing for reliable interpretations of the results. Standardization minimizes variations that could arise from different officers' approaches or differing environmental conditions, thereby enhancing the validity of the assessment.

By following a standardized procedure, the SFST can produce more objective results that can be replicated, making it easier to compare results across cases. This principle is crucial in law enforcement and legal contexts where consistent and reliable evidence is necessary, especially when assessing whether a driver is impaired due to alcohol or drugs.