What is autism? Learn about autism spectrum disorder (ASD), the autism definition, a brief overview of co-occurring conditions and access helpful resources.

3 hours ago - Autism, also known as autism spectrum disorder (ASD), is a condition characterized by differences or difficulties in social communication and interaction, a need or strong preference for predictability and routine, sensory processing differences, focused interests, or repetitive behaviors.

May 22, 2025 - This condition related to brain development causes problems in getting along with others socially and communicating. Symptoms and severity can vary widely.

September 22, 2025 - ASD is a developmental disability that can lead to social, communication, and behavioral challenges.

A definition of autism with an overview of communication, behaviours and interests, and sensory processing differences needed for an autism diagnosis.

April 15, 2025 - Autism spectrum disorder (ASD) is a developmental disability caused by differences in the brain.

Autism spectrum disorder is a neurological and developmental disorder that affects how people interact with others, communicate, learn, and behave.

Autism spectrum disorder (ASD) is a neurological and developmental disorder that begins early in childhood and lasts throughout a person's life. It affects how a person acts and interacts with others, communicates, and learns.

We cannot provide a description for this page right now

4 days ago - Identifying Autism, related conditions, diagnosis by life stage, and educational evaluations.

September 17, 2025 - The abilities and needs of autistic people vary and can evolve over time. While some people with autism can live independently, others have severe disabilities and require life-long care and support. Autism often has an impact on education and employment opportunities.

Learn about Autism Spectrum Disorder, including symptoms, risk factors, treatment options and answers to common questions.

September 16, 2025 - Autism is a developmental disorder with symptoms that appear within the first three years of life. Its formal diagnostic name is autism spectrum disorder. The word “spectrum” indicates that autism appears in different forms with varying ...

May 23, 2025 - Autism spectrum disorder (ASD) is a developmental disability caused by differences in the brain.

It's something you're born with. Signs of autism might be noticed when you're very young, or not until you're older.

We cannot provide a description for this page right now

The term Autism Spectrum Disorder (ASD) refers to a complex neurodevelopmental condition. Its presentation varies for each individual, but primarily, it affects communication and social interactions between a child and their caregivers, peers, and/or teachers.

An introduction to what autism is and how it affects people

The AAP recommends that all children be screened for autism at ages 18 and 24 months, along with regular developmental surveillance. Toddlers and children should be referred for diagnostic evaluation when increased risk for developmental disorders (including autism) is identified through screening and/or surveillance.

Autism (say: AW-tiz-um) spectrum disorder (or ASD) is a difference in the way a kid's brain develops.