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The following information is by a psychiatrist who is also the executive editor of the United Kingdom Intersex Association (UKIA), Dr J. Hayes-Light, who can be contacted at: jhl@ukia.co.uk
Auditory processing, is indeed the neurological
interactions required to make sense of and order what we hear. Children
with receptive language problems have difficulties with decoding
information from the sounds they hear. However.... (and there always is a
"however" in most things really). Some research has shown that in some
cases of CAPD, there is an accompanying, elevated high-frequency hearing
threshold. Central auditory disorders can occur in individuals with
peripheral hearing loss or of limited cognitive ability. A CAPD can occur
as a result of injury to or disease process in the central nervous system.
It may be due to neuromaturational factors. This suggests that there may
indeed be some auditory involvement as well as the neurological processing.
Whatever the other problems they face, in-practice, children with CAPD will
experience greater problems when the acoustic environment is less than
ideal such as in an open classroom or when the signal is poor due to
interference, intensity, or content.
A major obstacle to early diagnosis is the fact that CAPD cannot usually be
fully diagnosed until a child is around seven to eight years old. This
doesn't mean that problems with auditory processing can't exist in a
younger child, but the formal testing can't be done until the brain is more
mature. However, basic screening tests are available for children as young
as three years and a full CAP test battery can be administered to a child
five years or older. The CAP test battery should not only measure hearing,
but also should identify the presence or absence of CAPD. In other
conditions, e.g. middle ear problems, such as otitis media (fluid in the
middle ear), many of the behaviours described as typical of CAPD will be
present. This can often lead to misdiagnosis of the root of the problem.
the best professional discipline for assessing such problems is an
audiologist working in-association with a child-behaviourist.
Unfortunately, the initial assessment is often left to a general
paediatrician, who really does not have the requisite skills.
It should be remembered that 85-90% of children who have processing
problems, have had a history of chronic middle ear infection. Of note is
the fact that one month of hearing loss is equal to three months of
auditory listening skill development.
typical tests for children are:
* SCAN - An auditory Processing Test
Internet Guide to Understanding CAPD is large CAPD only resource. It also includes a CAPD web-ring.
A Central Auditory Processing Deficit Will Affect Learning Potential is an excellent 65k PDF article by R.N. Whitehead that explores various central auditory processes and the effect their dysfunction can have on the student. Diagnostic possibilities are explored and instruction aids are included.
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