SFST Review Flashcards
Common symptoms of alcohol influence
- Slowed reactions
- Increased risk taking
- Impaired vision
- Poor coordination
Most common and reliable initial indicators of impaired driving
Problems of maintaining proper lane position.
Speed and braking problems.
Vigilance problems.
Judgment problems.
Alcohol impairs the ability to___________among tasks
Divide attention
Interview/Questioning techniques
Asking for two things simultaneously.
Asking interrupting or distracting questions.
Asking unusual questions.
Divided attention.
Concentrating on more than one thing at a time (mental tasks and physical tasks)
Possible factors affecting high ASD
Residual mouth alcohol.
Breath contaminants.
Possible factors affection low ASD
Breath sample cooling.
Breath sample composition.
The purpose of the ASD is…
To associate alcohol with the evidences observed
Original SCRI test data results
HGN was 77% accurate.
Walk and turn was 68% accurate.
One leg stand was 65% accurate.
Three SFST validation studies were undertaken between 1995 and 1998.
Colorado - 1995
Florida - 1997
San Diego - 1998
San Diego Field Validation Study of SFST
HGN = 88%
Walk and turn = 79%
One leg stand = 83%