There is no one single test that can be used to test for dyslexia. A battery of tests must be administered. Tests should be chosen on the basis of their measurement properties and their potential to address referral issues. Various tests may be used but the components of a good assessment should remain constant. Tests that measure reading, speaking, writing, listening, intellectual functioning, cognitive processing, and educational achievement must be administered. The expert evaluator will conduct a comprehensive assessment to determine whether the person’s learning problems may be related to other disorders such as attention deficit hyperactivity disorder, central auditory processing dysfunction, affective disorders, or physical or sensory impairments.

How long does testing take?
An average test battery will take from three to six hours. Sometimes it will be necessary to conduct the testing in more than one session, particularly in the case of a young child whose attention span is very short.

At what age should an individual be tested for dyslexia?
Individuals may be tested for dyslexia at any age. Tests that are selected will vary according to the age of the individual. Young children may be tested for phonological processing, receptive and expressive language abilities, and the ability to make sound/symbol associations. When problems are found in these areas remediation can begin immediately. A diagnosis of dyslexia need not be made in order to offer early intervention in reading instruction.

Parents of school age children should request testing through the school; they are entitled by law to a free assessment. Psychologists are available who charge a private fee. The Philadelphia Branch maintains a list of diagnosticians.

Check the Book and Videotape resources listed on this website for more information about testing.

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