The Standardized Field Sobriety Test (SFST) is a series of exercises that a law enforcement officer gives to a driver suspected of driving under the influence of alcohol. The original research that demonstrated a high correlation between failure of the SFST and a high blood alcohol concentration did not utilize a standard control group to validate that the failure of the SFST was not a characteristic of the population at large. This study examined a series of drug naive subjects to determine the rate of failure of the SFST to accurately distinguish a suspect with high blood alcohol content from the general public. Of the 185 subjects tested, 26% of the drug naïve subjects failed the SFST.
Yoshizuka, K., Perry, P. J., Upton, G., & Ip, E. J. (2014). Standardized field sobriety test: False positive test rate among sober subjects. Journal of Forensic Toxicology and Pharmacology, 3(2), [Article 120].
Originally published in Journal of Forensic Toxicology & Pharmacology, 3(2), [Article 120]. The original material can be found here.