Symptoms of Autism

Core symptoms

The severity of symptoms varies greatly, but all people with autismhave some core symptoms in the areas of:

  • Social interactions andrelationships. Symptoms may include:
    • Significant problems developing nonverbal communication skills, such as eye-to-eyegazing, facial expressions, and body posture.
    • Failure to establish friendships with children the same age.
    • Lack of interest in sharing enjoyment, interests, or achievements with other people.
    • Lack of empathy. People with autism may have difficulty understanding another person’s feelings, such as pain or sorrow.
  • Verbal and nonverbal communication. Symptoms may include:
    • Delay in, or lack of, learning to talk. As many as 40% of people with autism never speak.1
    • Problems taking steps to start a conversation. Also, people with autism have difficulties continuing a conversation after it has begun.
    • Stereotyped and repetitive use of language. People with autism often repeat over and over a phrase they have heard previously (echolalia).
    • Difficulty understanding their listener’s perspective. For example, a person with autism may not understand that someone is using humor. They may interpret the communication word for word and fail to catch the implied meaning.

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