There is a wide range of symptoms and severity across the autism spectrum. Given this fact, which observation is most crucial in establishing a diagnosis of autism?

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Autism is a spectrum disorder described as a set of behaviors that children and adults display in various ways. There is normally little interest in most activities and noticeable delays in spoken language. Nonverbal behaviors such as body posture and facial expressions can become a problem with autism. One third of patients with this diagnosis have a normal IQ.

There Is a Wide Range of Symptoms and Severity Across