Some children who read early or speak late are misdiagnosed with autism.
Diagnosing autism is an evolving science but a crucial first step to understanding the disorder.
The rate of autism among 4-year-olds is lower than that among 8-year-olds, suggesting that many children go undiagnosed until they start school.
Instead of debating about whether to screen all children for autism, we should be looking for better ways to identify children at risk and help them access services.
Despite the exit of its leader, the National Institute of Mental Health is moving forward with plans for a new system to classify mental illness.
The largest study of people with autism and obsessive-compulsive disorder to date adds to mounting evidence that the two conditions share genetic roots.
The latest estimate of autism prevalence suggests the condition is more common than previously thought, and highlights the complexity in the seemingly simple statistic.
About 1 in 45 children in the U.S. have autism, up 79 percent from the estimate for 2013. But there is more to the apparent jump in diagnoses than meets the eye.
Roughly 13 percent of children with autism eventually lose their diagnosis, either because they outgrow it or because they never had autism to begin with.