Autistic people who have trouble speaking or moving often do poorly on standard tests of intelligence. Newer methods promise to uncover their abilities — and improve our understanding of autism itself.

Autism is predominantly genetic in origin, but a growing list of prenatal exposures for mother and baby may sway the odds.

A lack of interest, training and pay may limit the supply of specialists best equipped to diagnose and treat children with autism.

Grunya Sukhareva characterized autism nearly two decades before Austrian doctors Leo Kanner and Hans Asperger. So why did the latter get all the credit?

Researchers and autistic artists exploring virtual reality to study, treat and simulate autism traits.

A remote Colombian town is home to the world’s largest cluster of people with fragile X syndrome. Scientists are learning from them — and trying to help.

Autism and post-traumatic stress disorder share many traits, but the connection between them was largely overlooked until now.

An electrical brain implant all but erased the obsessions that had consumed Becky Audette, years after her autism diagnosis. Could similar implants help other people with severe autism?

Many people with autism entertain thoughts of suicide and yet show few obvious signs of their distress. Some scientists are identifying risks — and solutions — unique to autistic individuals.

Adults on the spectrum frequently have a range of other conditions — but they rarely get the help they need.