What Does 'Mild Autism' Mean?

Child playing with toys in room

Because autism is a "spectrum disorder," it is possible to have a very wide range of symptoms. At one point, there were five different autism spectrum diagnoses, and people whose autistic symptoms were less challenging were generally diagnosed with Asperger syndrome. In 2013, however, the diagnostic criteria were changed. Rather than five separate autism spectrum diagnoses, there is now only one: autism spectrum disorder.

What this means is that there is no official diagnosis meaning "person with relatively mild autistic symptoms," but there are still plenty of people who fit that bill.

While the new autism spectrum disorder does include "levels of support," the idea of describing some as having "level 1 autism" has not really caught on—largely because no one really knows what this means. Many people have continued to use the term "Asperger syndrome," but even this term doesn't mean quite the same thing as "mild autism."

What Do People Mean by 'Mild Autism'?

So, what does a practitioner, teacher, or parent mean when they say their child (or your child) has "mild" autism? Since there is no official definition of the term "mild autism," every person using it has a slightly different idea of what it means. 

  • Sometimes the term is used when an individual is clearly autistic, but also has significant spoken language and other skills. For example, "Joey is very bright and does well in class, but because he has mild autism he has a tough time making friends."
  • Or... the term may also be used euphemistically to describe a child whose challenges are by no means mild, but who has just a few spoken words. For example: "I'm so glad to see your child is using hand gestures to ask for juice; he may wind up with relatively mild autism."
  • The term may also be used to help explain treatment decisions. For example: "Your child has mild autism, so he may do better with play therapy than with intensive behavioral therapy."

    To make matters more difficult, a person with "mild autism" may have advanced communication skills and academic abilities, but have very delayed social skills, severe sensory issues, and/or extreme difficulties with organizational skills. As a result, the individual with "mild" autism may find public school or work settings more challenging than an individual with greater language challenges but fewer sensory or social problems.

    As an example, imagine a very academically bright, linguistically advanced individual who can't stop himself from blurting out answers in the classroom, and falls apart at the sound of a vacuum cleaner or the light of a fluorescent bulb. Compare such a person to an individual who has significant problems with academics but has few issues with sound or light, and has no problem following rules. Which individual has "milder" symptoms? The answer, of course, is that it depends on the setting and the situation.

    How Do the Diagnostic Criteria Help Define Mild Autism?

    The DSM-5 diagnostic criteria do offer some help with that question, because they include three "functional levels" to describe the severity of autism. People who are "mildly" autistic are generally considered to be level 1, meaning they need relatively little support to live a normal life.

    But, of course, that's misleading because many people with "mild" autism may need a great deal of support depending upon the situation. For example, a person with "mild" autism may have great verbal skills but have no ability to read another person's body language or emotions. As a result, plenty of people with "mild" autism get themselves into trouble with the opposite gender, with work or classmates, or even with the police.

    The Bottom Line

    Bottom line, the term "mild autism" is not especially useful, though it is fairly common. The reality is that "mild" symptoms can lead to serious problems in the areas of social communication, relationships, employment, and independence.

    They can also be associated with significant emotional challenges: Many people with "mild" autism are also struggling with anxiety, depression, obsessive compulsive disorder, and other mental illnesses.

    To really understand autism's challenges, avoid generalizing based on a term like "mild autism." Instead, ask direct, specific questions about an individual's verbal, social, sensory, and behavioral challenges. Then, ask about the person's strengths, talents, and interests!


    Attwood, Tony. The Complete Guide to Asperger Syndrome. Jessica Kingsley Press:2007.

    Koyama T, Tachimori H, Osada H, Takeda T, Kurita H. "Cognitive and symptom profiles in Asperger's syndrome and high-functioning autism." Psychiatry Clin Neurosci. 2007 Feb;61(1):99-104.

    Seung HK. "Linguistic characteristics of individuals with high functioning autism and Asperger syndrome." Clin Linguist Phon. 2007 Apr;21(4):247-59.

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