This description of the Walk and Turn test posted by San Francisco DUI Lawyer.

Individuals wearing heels more than two inches high should be given the opportunity to remove their shoes. Individuals who can not see out of one eye may also have trouble with this test due to poor depth perception. They should not be given this test.

The Walk and Turn test is an objective test based upon certain predictable errors that a person under the influence may display. It has a set scoring criteria, specific scoring factors and administrative procedures. In order to properly administer this test it is important to understand what type of test this is. It is commonly referred to as a Divided Attention Test because it divides the suspect's attention between mental and physical tasks.

The physical tasks include balance and coordination while the mental tasks include comprehension of verbal instructions, processing of information and recall of memory. While a person may be able to perform one task they may not be able to perform the other if under the influence of an alcoholic beverage.