Autism - Wikipedia
Toggle Signs and characteristics subsection. 1.1Social and communication skills. 1.1.1Social–emotional reciprocity. 1.1.2Spoken communication. 1.1.3Nonverbal communication. 1.1.4Developing and sustaining relationships. 1.2Restricted and repetitive behaviors. 1.2.1Repetitive behaviors. 1.2.2Resistance to change.

Autism spectrum disorder - Symptoms and causes - Mayo Clinic
JAMA Pediatrics. 2021; doi:10.1001/jamapediatrics.2020.5371. Taylor MJ, et al. Etiology of autism spectrum disorders and autistic traits over time. JAMA Psychiatry. 2020; doi:10.1001/jamapsychiatry.2020.0680. AskMayoExpert. Autism spectrum disorder (ASD). Mayo Clinic; 2024.

What is autism? - NHS
Autism is a difference in how your brain develops that affects how you see and experience the world. It is often called a type of neurodivergence. You might also hear autism called autism spectrum disorder (ASD). This is the medical term for a diagnosis of autism.

Autism: Symptoms, Causes, Types, and Testing - WebMD
Autistic disorder. This is what most people think of when they hear the word "autism." It affects social interactions, communication, and play in children younger than 3 years.

Signs and Symptoms of Autism Spectrum Disorder
Living with Autism Spectrum Disorder .

What is autism - National Autistic Society
Autistic people are different from each other, but for a diagnosis they must share differences from non-autistic people in how they think, feel and communicate.

What is Autism? - Autism Research Institute
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 levels of severity.