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Article #141: Diagnosing Autism Spectrum Disorders

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An early diagnosis of autism spectrum evaluation should include neurologic and
disorder is important so that earlier genetic assessments as well as in-depth
needed interventions can begin, however, cognitive and language testing. The
there are still many concerns about measures developed specifically for
"labeling" a young child with autism diagnosing autism often include:
spectrum disorder. There is a lot of -Autism Diagnosis Interview-Revised
evidence that indicates intensive early (ADI-R)
intervention in optimal educational -The Autism Diagnostic Observation
settings for at least 2 years during the Schedule (ADOS-G)
preschool years is very effective in What is the Autism Diagnosis
improving outcomes in most young children Interview-Revised (ADI-R)?
with autism spectrum disorder. The Autism Diagnosis Interview-Revised is
Behavioral characteristics are the first a structured interview that contains over
clues clinicians use to make a diagnosis 100 items and is done with the caregiver.
of autism spectrum disorder. Some of the This tool consists of four main parts:
characteristic behaviors of autism -The child's communication
spectrum disorder are apparent in the -The child's social interaction
first few months of life, or appear at -The child's repetitive behaviors
any time during the early years. A -Age-of-onset symptoms
diagnosis of autism spectrum disorder may What is the ADOS-G?
be made if there are deficits in at least This is an observational diagnostic tool
one of the following areas before the age that is used to "press" for
of 3: socio-communicative behaviors that are
-Communication often delayed, abnormal, or absent in
-Socialization children with autism spectrum disorder.
-Restricted behavior The Childhood Autism Rating Scale (CARS)
There are two stages to the diagnosis The Childhood Autism Rating Scale (CARS)
process: is another screening tool professionals
1.Developmental screening during "well often use to evaluate:
child" check-ups -The child's body movements
2.A comprehensive evaluation by a -Adaptation to change
multidisciplinary team -Listening response
If your routine "well child" check-up -Verbal communication
does not include a developmental -The child's relationship to people
screening test, you should ask that it be The Childhood Autism Rating Scale is
done. As a parent or caretaker, your own suitable for use with children over 2
observations and concerns about the years of age. The evaluator not only
child's development will be very observes the child, but also obtains
important in helping to evaluate your related information from the parents. The
child. evaluator then rates the child on a scale
Screening tools used to gather based on deviation from the typical
information about a child's social and behavior of children of the same age.
communication development within medical Other Tests
settings include: Two other tests that should be used to
-The Checklist of Autism in Toddlers assess any child with a developmental
(CHAT) delay are:
-The modified Checklist for Autism in -A formal audio logic hearing evaluation
Toddlers (M-CHAT) -Lead screening
-The Screening Tool of Autism in Experts feel some hearing loss can occur
two-Year-Olds (STAT) with autism spectrum disorder; however,
-The social communication Questionnaire some children with autism spectrum
(SCQ) (for children 4 years of age and disorder may be incorrectly diagnosed
older) with hearing loss. Children who remain in
Other screening tools include: the oral-motor stage for a long period of
-Parent responses to a questionnaire time require lead screening. A child with
-Combination of parent report and an autistic disorder usually has elevated
observation blood lead levels.
Screening tools do not provide individual The Responsibility of the
diagnosis. They serve to assess the need Multidisciplinary Team
for referral for possible diagnosis of The multidisciplinary diagnostic team has
autism spectrum disorder. These screening a responsibility to thoroughly evaluate
methods may not always identify children the child. They will assess the child's
with "mild" autism spectrum disorder like unique strengths and weaknesses, and then
those with high-functioning autism or determine a formal diagnosis. Once a
Asperger syndrome. Evaluators feel a key diagnosis has been made the team will
difference in children with autism from meet with the parents or caretakers of
other children before the age of 2 the child to explain the evaluation
include pointing and pretend play. results.
In the last few years screening tools Meeting with the Parents or Caregivers
devised to screen for Asperger syndrome for a Final Diagnosis
and higher functioning autism include: Most parents are already aware that
-The Autism Spectrum Screening "something" was just not quite right with
Questionnaire (ASSQ) their child. Nonetheless, when the
-The Australian Scale for Asperger's diagnosis of autism spectrum disorder is
Syndrome given, it can be devastating. Some
-The Childhood Asperger Syndrome Test parents may even go into a denial stage,
(CAST) (the most recent) and it may be difficult to focus on
These screening tools are reliable for asking questions. One of the best
identification of school-age children opportunities the parents have to ask
with Asperger syndrome or higher questions is while the evaluation team is
functioning autism. Concentration together. The focus now should be: What
includes: further steps parents or caretakers of a
-Social and behavior impairments in child with autism spectrum disorder
children without significant language should take? It is to the best advantage
delay of the parents or caretakers to learn as
The second stage of diagnosis is a much as possible at this meeting. Take
comprehensive diagnostic evaluation. The note of the name or names of
comprehensive diagnostic evaluation is professionals who you can contact later
designed to accurately rule in or rule if you have further questions.
out an autism spectrum disorder or other Source: National Institute of Mental
developmental problem. The evaluation is Health
usually done by a multidisciplinary team Disclaimer: *This article is not meant to
that includes: diagnose, treat or cure any kind of a
-A psychologist health problem. These statements have not
-A neurologist been evaluated by the Food and Drug
-A psychiatrist Administration. Always consult with your
-A speech therapist health care provider about any kind of a
-Other professionals who diagnose health problem and especially before
children with autism spectrum disorder beginning any kind of an exercise
Autism spectrum disorders are complex and routine.
often involve other neurological or This article is FREE to publish with the
genetic problems. A comprehensive resource box. Article written 5-2007.






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