There was little consistency or standardization in the tests being used.
Concerned over this lack of consistency, the National Highway Traffic Safety Administration (NHTSA) initiated an effort to identify the best tests for enforcement use and standardize the way they were administered and scored.
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You asked for a review of the use of field sobriety tests for drunk driving enforcement and, specifically, the so-called “California tests.” You wanted to know the scientific basis used for giving the field sobriety test battery, how it is determined if someone passes or fails the tests, and what Connecticut cases allow this information to be used to remove a license.
Until the mid 1970s, police departments around the country used many different types of field sobriety tests in enforcing drunk driving laws.
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Out of the dozens of different tests then in use, the researchers identified three—the walk-and-turn, one-leg-stand, and horizontal gaze nystagmus tests—as the most accurate, practical, and reliable tests for enforcement purposes.Average test score with the right hand was 60.9 and 57.8 with the left hand.Discussion: Girls' average test scores were significantly higher.A questionnaire directed towards parents and teachers was used for evaluating the children's performance on every-day life and school-related activities for validating the construct; correlation with the test was established.Results: Data related to 386 children (55.4% male) was analysed; 67.9% of these children were attending a public school and 90.2% had right dominance.This encourages automatic holding of position and orientation to improve performance.