A diagnosis of autism spectrum disorder (ASD), or autism, involves one of three levels.

This handbook is published by the American Psychiatric Association (APA) to diagnose mental disorders.

People with level 1 autism require minimal support to face these challenges.

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Deficiencies in social skills and behavior can result in exclusion, rejection, and even bullying by others.

Support strategies are most effective when they are individualized to the needs of a person with level 1 autism.

They have difficulty with independent living.

They need more support, including constant professional help with making adjustments.

Daily living activities and social interactions are more challenging and debilitating than for those with level 1 autism.

People in this category require lifelong support from a caregiver since they cannot live alone.

This can mean having an around-the-clock caregiver with rigorous therapy.

They have challenges with everyday tasks involving self-care, safety, and well-being.

A diagnosis is reached after extensive evaluation by a multidisciplinary team of healthcare professionals.

A diagnosis of ASD symptoms involves a comprehensive, multistep assessment.

Screening tools: Several screening tools are used to identify ASD.

The specific tests chosen depend on the age of the person being evaluated and their symptoms.

Several types of free self-administered tests can help you measure autistic traits.

It’s possible for a child to be on the spectrum and not have obvious signs.

As a result, some people may not get a diagnosis of ASD until adolescence or adulthood.

Your healthcare provider can conduct an autism test for adults if you demonstrate signs of autism later in life.

Contact your healthcare provider if you notice any of the following signs of ASD in yourself or your child.

Levels of autism fall on a spectrum or range because the signs and symptoms of autism are so varied.

Every person with autism has unique characteristics and different strengths and challenges.

The diagnosis describes the person’s level of support needed at the time of their diagnosis.

However, it does not address how the need for support may change in the future.

Each level is unique in the degree of support a person needs.

Using autism levels helps healthcare providers and specialists provide the right treatments and services.

They also help caregivers better understand and support a person’s needs.

Autism Speaks.ASD levels of severity.

Special Olympics Arizona.What is high-functioning autism?

Ability Central.What to do first after an autism diagnosis.

Autism Parenting Magazine.Low functioning autism: all you should know.

Integrityinc.High-functioning autism vs. low-functioning autism.

Rise Up 4 Autism.Your guide to level 3 autism: symptoms, support, and intervention.

NHS.What happens during an autism assessment.

Autism Society.Screening and diagnosis: identifying autism.

ISSN 1071-9091. doi:10.1016/j.spen.2020.100831

Operation Autism.The diagnostic process.

Children’s Hospital of Philadelphia Research Institute.Wondering if you’re autistic?

Centers for Disease Control and Prevention (CDC).Treatment and intervention for autism spectrum disorder.

Do you think your child may have autism?Learn when to seek an autism evaluation.

U.S. Centers for Disease Control and Prevention (CDC).Signs and symptoms of autism spectrum disorder.

Seattle Children’s.Autism and “levels of support.”