Autism is defined as a developmental disorder in which people have difficulties with several functions: social behavior, communication, expressing emotions, imagining, and taking an interest in the world around them. Research has found that autism is a neurocognitive disorder caused genetically and transmitted through autistic person’s families. By understanding what causes autism, we can begin to understand better how to treat it. Research on Attention Deficit Hyperactivity Disorder (ADHD) has provided insights into autism as a neurocognitive disorder. Individuals with autism often show a great deal of interest in details most of us would only barely notice or ignore. Most of us dining at a restaurant would notice the waiter taking our order, while a person with autism might be fascinated with the lights or tablecloth. This behavior is due to structural abnormalities in certain parts of the brain. Likewise, shifting attention from one object to another requires thinking and memory. While most of us take shifting attention for granted, that ability is difficult for individuals with autism. Children with autism and ADHD have problems shifting or maintaining attention.
Research in the late 1980’s and 1990’s shed light on autism’s many defects in thinking. Rumsey and Hamburger conducted a study demonstrating dramatic impairments in reasoning that were not accounted for by problems in other skills. The study showed that patients with autism had good performance on tests requiring simple language ability and memory, but moderate to severe impairment in more complex thinking tasks. In 1992 Minshew and others showed that autistic patients performed normally on simple memory tests and tests of basic language, such as word fluency, reading, decoding, and spelling. Memory problems were seen with delayed recall, and language problems were demonstrated on tests of more advanced abilities such as comprehension of sayings, metaphors, and unclear sentences. A pattern emerged showing that simple abilities were normal but complex abilities were not. Deficits in the ability to think with language and use language to shift from one thought to another were also identified.
Posted on
Mon, August 1, 2011
by Dr. Karina Poirier