What is an essential element of conducting a SFST correctly?

An essential element of conducting a Standardized Field Sobriety Test (SFST) correctly is the officer's training and adherence to the standardized protocol. The SFST methodology was developed to ensure that the tests are administered consistently and reliably, which helps minimize bias and increases the accuracy of the results. Proper training equips officers with the knowledge of how to conduct the tests, interpret the outcomes, and understand the underlying principles behind the assessments. Following standardized procedures is crucial in obtaining valid and defensible evidence in DUI investigations.

The other options suggest practices that deviate from the principles of SFST administration. Personal judgment can lead to inaccuracies, as these tests must be based on observable, standardized criteria rather than subjective interpretation. Conducting tests without supervision compromises accountability and may lead to procedural errors. Compiling results from others' observations lacks the reliability of a trained officer executing the tests directly according to established guidelines.