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Characteristics of Children with Autism Spectrum Disorders (page 4)

By W.L. Heward
Pearson Allyn Bacon Prentice Hall
Updated on Jul 20, 2010

Unusual Responsiveness to Sensory Stimuli

Many children with autism react to sensory stimulation in atypical ways. This takes the form of over- and underresponsiveness to sensory stimulation. An overresponsive (hypersensitive) individual may not be able to stand certain sounds, dislike being touched or the feel of certain textures, and refuse to eat foods with certain smells or tastes. In her autobiography, Thinking in Pictures and Other Reports of My Life with Autism, Temple Grandin (1995) describes how overly sensitive skin and certain sounds bothered her as a child.

Washing my hair and dressing to go to church were two things I hated as a child. . . . Scratchy petticoats were like sandpaper scraping away at raw nerve endings. . . . loud noises were also a problem, often feeling like a dentist’s drill hitting a nerve. They actually caused pain. I was scared to death of balloons popping because the sound was like an explosion in my ear. Minor noises that most people can tune out drove me to distraction. . . . My ears are like microphones picking up all sounds with equal intensity.

An underresponsive (hyposensitive) child appears oblivious to sensory stimulation to which most people react. Some children with autism do not seem to feel pain in a normal way. Some underresponsive children will spin round and round, rock back and forth, or rub and push things hard into their skin to create additional forms or higher intensities of stimulation. It is not uncommon for an individual with autism to display a combination of both over- and underresponsiveness—for example, being hypersensitive to tactile stimulation but unresponsive to many sounds.

We may move directly in front of the child, smile, and talk to him, yet he will act as if no one is there. We may not feel that the child is avoiding or ignoring us, but rather that he simply does not seem to see or hear. . . . As we get to know the child better, we become aware of the great variability in this obliviousness to stimulation. For example, although the child may give no visible reaction to a loud noise, such as a clapping of hands directly behind his ears, he may orient to the crinkle of a candy wrapper or respond fearfully to a distant and barely audible siren. (Lovaas & Newsom, 1976, p. 308)

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