What was addressed in the San Diego SFST Validation Study regarding SFST's?

The San Diego SFST Validation Study specifically addressed whether the Standardized Field Sobriety Tests can effectively discriminate between different blood alcohol concentration (BAC) levels, particularly at levels below 0.10%. The significance of this inquiry lies in the accuracy and reliability of SFSTs as a tool for law enforcement officers to assess a driver's level of impairment. By validating that these tests can indeed differentiate levels of impairment at BACs below 0.10%, the study provided crucial insights into the efficacy of SFSTs in identifying impaired drivers, even at lower BACs where previous legal thresholds may not have applied.

The other options, while relevant to the overall discussion of SFST efficacy, pertain to different dimensions of the tests. The notion of improvement with training speaks to the skill set of officers administering the tests but does not directly reflect the core objective of the validation study. Reliability across different states or use at night are factors that would influence the implementation and practical applications of SFSTs but were not the primary focus of the San Diego study.