Rubenzer, S. (2003a). The Psychometrics and Science of the Standardized Field Sobriety Tests (Part 1). The Champion(May), 48.
Rubenzer, S. (2003b). The Psychometrics and Science of the Standardized Field Sobriety Tests (Part 2). The Champion(June), 40.


This article reviews the conceptual and empirical limitation of NHTSA’s Standardized Field Sobriety Test battery which is used to establish probable cause in DUI cases and to provide evidence of intoxication at trial. None of NHTSA’s studies have been published in peer-reviewed journals and the three field studies that have been promulgated as establishing their validity in roadside environments are showed to be severely flawed and inadequate. Lastly, the tests are reviewed under the standards for psychological testing with attention to the problems with greatly variable baserates across the conditions in which the SFSTs are used.

PDF of Parts 1 & 2 combined