DWI
Detection and Standardized Field Sobriety Testing
Session
7 – Phase Three: Pre-Arrest Screening
• Divides
subject’s attention:
• Balancing
• Information
processing
• Subject
stands with feet in heel to toe
position
• Arms
at side
• Listen
to instructions
Walk and Turn – Instructions Stage
7-18
The
Instructions Stage divides the subject's attention between a balancing task
(standing
while maintaining the heel to toe position) and an information processing task
(listening
to and remembering instructions).
In
the Instructions Stage, the subject must stand with their feet in a heel to toe
position,
keep
their arms at their sides, and listen to the instructions.
DWI
Detection and Standardized Field Sobriety Testing
Session
7 – Phase Three: Pre-Arrest Screening
Divides driver's attention:
• Balancing
task
• Small
muscle control task
• Short
term memory task
Walk and Turn – Walking Stage
7-19
In
the Walking Stage the subject takes nine heel to toe steps, turns in a
prescribed
manner,
takes nine heel to toe steps back, counts the steps out loud, and watches their
feet.
During the turn, the subject keeps their front foot on the line, turns in a
prescribed
manner,
and uses the other foot to take several small steps to complete the turn. The
Walking
Stage divides the subject's attention among a balancing task (walking heel to
toe
and turning); a small muscle control task (counting out loud); and a short term
memory
task (recalling the number of steps and the turning instructions).
The
walking stage divides the subject's attention between a task of listening,
comprehending
and carrying out the instruction.
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HS
178 R5/13 12 of 26
DWI
Detection and Standardized Field Sobriety Testing
Session
7 – Phase Three: Pre-Arrest Screening
1. Cannot keep balance while
listening to the instructions
2. Starts too soon
3. Stops while walking
4. Does not touch heel to toe
5. Steps off the line
6. Uses arms to balance
7. Improper turn
8. Incorrect number of steps
Walking and Turn Test Clues
7-20
The
Walk and Turn test is administered and interpreted in a standardized manner,
i.e.,
the
same way every time. Officers administering the Walk and Turn test observe the
subject's
performance for eight clues:
•
Cannot keep balance while listening to the instructions
•
Starts too soon
•
Stops while walking
•
Does not touch heel to toe
•
Steps off the line
•
Uses arms to balance
•
Improper turn
•
Incorrect number of steps
Inability
to complete the Walk and Turn test may occur when the subject is in danger of
falling
or otherwise cannot complete the test.
Notes:_______________________________________________
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HS
178 R5/13 13 of 26
Standardized Field
Sobriety Testing
March 2013 Edition
Standardized Field Sobriety Test Course
Session 1 - Introduction
Glossary of Terms
10/27 added up to Session 6-Phase Two: Personal Contact
DWI Detection and Standardized Field Sobriety Testing
What do you see?
Personal Contact
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