One Leg Stand Test

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Definition of One Leg Stand Test

The one leg stand test is one of three tests (used in a field sobriety test) by police officers to determine if drivers are operating a motorized vehicle under the influence of alcohol. This test, along with the horizontal gaze nystagmus test and the walk-and-turn test, are part of the NHTSA standardized field sobriety test. The one-leg stand test is considered a divided attention test because it tests a driver's ability to complete several tasks simultaneously. To complete the test the driver must stand on one leg and raise the other leg approximately 6 inches off the ground while the driver counts aloud to 30. The police officer is evaluating the driver's ability to avoid swaying, to keep their arms to their sides, and to avoid hopping or putting their foot down.

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