The Battousai | Why You Probably Shouldn't Do Field Sobriety Tests @TheBattousaiMedia | Uploaded April 2021 | Updated October 2024, 20 hours ago.
There’s much debate over the topic with some claiming the tests have proven to be 90% accurate for detecting DUI when administered by a trained officer. However, according to the DUI DWI Foundation, the tests are reliable in only 65% to 77% of all cases.

NHTSA says there is a 65% chance the driver’s BAC is 0.10% or higher if they fail two or more of the tests. Failing one can result in an officer requesting that the driver take a breath or chemical test to confirm their suspicions. Trained officers will usually ask drivers whether there is any reason they could fail the test. These reasons can include:

Certain medical conditions
Disabilities
Age
Injury
Medications
Wearing contact lenses

scottsdale-duilawyer.com/blog/2019/10/how-reliable-are-field-sobriety-tests
judnichlaw.com/why-sober-drivers-fail-field-sobriety-tests
blasslaw.com/areas-we-serve/houston-tx/dwi-lawyer/dwi-laws-and-facts
fieldsobrietytests.org/accuracyoffieldsobrietytests.html