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SCAN-A: A Test for Auditory Processing Disorders in Adolescents and Adults

The inability or impaired ability to attend to, discriminate, recognize, remember, or comprehend information presented auditorily, even though the individual has normal intelligence and hearing acuity.

Poor performance on central auditory tests reflects difficulty processing auditory information at the brainstem and cortical levels, not at the level of the external auditory canal, middle ear, cochlea, or auditory nerve.

Interpretations:

Example:

Filtered Words and Auditory Figure-Ground tap auditory perception of distorted speech or poor acoustic environment. Subtests represent functional auditory abilities in everyday listening situations.

Raw S. Stand. S.

Filtered words: 18 1

Aud Fig-Ground 11 1

Comp. Words 10 1

Comp Sentences 0 1

Interpretations:

Example:

These were the results obtained from a client with a TBI. The scores fell within the classification of "Disordered" auditory processing, which can be evidenced in the client's daily activities and interactions.

Competing Words and Competing Sentences are dichotic speech tasks that reflect the development of the auditory system, auditory maturation, and hemispheric specialization.

What is Auditory Processing

Disorder?

What can cause Auditory Processing Disorders in Adults?

Neurologic disorders, including Parkinson's disease, chronic alcoholism, Alzheimer's disease, Multiple Sclerosis, AIDS, head trauma, and stroke.

What does the SCAN-A assess?

  • Filtered Words: Subject asked to repeat words that sound muffled.
  • Auditory Figure-Ground: Evaluates the subject's ability to understand words in the presence of background noise.

Where is the damage?

What does the SCAN-A assess?

  • Competing Words: The subject hears two words simultaneously- one word presented in each ear. The subject is instructed to repeat the words presented, repeating the word heard in the right ear first, followed by the word in the left ear, and vice-versa.
  • Competing Sentences: Pairs of sentences unrelated in topic are presented simultaneously to both ears. The sentences have simultaneous onset and offset times. The subject is instructed to direct attention to the stimuli presented in one ear while ignoring the stimuli presented in the other ear.
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