Autism spectrum disorder (ASD) is a developmental disability that can cause significant social, communication, and behavioral challenges. These challenges can adversely affect all aspects of life, or one aspect of life greatly, such as the ability to effectively communicate wants and needs (vocal or non-vocal), interacting with others, participating in the community, completing self-care and daily living activities, and other forms of learning.
Autism is a spectrum disorder, meaning that the learning, thinking, and problem-solving abilities of Autistic people can range significantly, and similarly, the amount of help needed in daily life also varies from fully independent to support-dependent. Each person with autism has unique strengths and challenges, just like all humans.
A diagnosis of ASD now includes several conditions that used to be diagnosed separately: autistic disorder, pervasive developmental disorder not otherwise specified (PDD-NOS), and Asperger syndrome. These conditions are now all called autism spectrum disorder.