Autism is a spectrum. This metaphor is a helpful way to explain why autism looks and feels so varied across different people.

Level 1 autism requires minimal support and includes challenges in communication and social skills. Level 2 autism needs more substantial support due to significant difficulties with social skills and ...

When people hear the word autism, it’s often associated with a specific set of traits. But in reality, autism spectrum disorder (ASD) is just that—a spectrum, encompassing a broad range of differences ...

Readers weigh in on the challenges of defining and diagnosing the condition. To the Editor: Re “In New Focus on Autism, Some Worry the Spectrum Is Too Broad” (front page, Oct. 5): One thing’s for ...

Studies reveal a complex interplay of traits, genes, and brain structure behind the dual diagnosis—raising new questions ...