If you are pulled over for suspicion of driving under the influence in Wisconsin, at some point the police will likely ask you to step out of your car in order to take part in testing used with the intention of confirming the officer's suspicion that you are intoxicated due to drug use or alcohol consumption.
You probably already have some awareness of these roadside tests used by police to test for drunk driving, whether in movies or real life. The official term for these tests is, field sobriety tests (FSTs).
While you may be asked to perform any number or combination of FSTs, the National Highway Traffic Safety Administration recognizes three tests as standardized field sobriety tests. These tests include: the horizontal gaze nystagmus test or HGN, the walk-and-turn test (WAT) and the one-leg stand test (OLS).