Two drugs that alter the activity of the hormone vasopressin seem to improve social communication in autistic people, but some experts question the findings.

Serotonin, the brain chemical best known for its link to depression, may also be involved in autism.

The International Society for Autism Research faces a thorny problem: how to please a diverse mix of attendees who have radically different goals.

New assessments of the subtle motor difficulties that characterize autism could improve autistic children’s lives and teach us a lot about the condition.

Difficulties hearing and processing sounds are common in autism and may originate in the brainstem — offering the possibility of an inexpensive screen for the condition.

Motor problems in autistic infants may parallel those in infants with other developmental conditions.

Any study of postmortem brains must control for artifacts, which are pervasive in brain tissue.

Doctors can now order a blood test that its makers say may help flag autism, but experts say the test is not appropriate for use in clinics.

A popular system used to detect speech may not identify most vocalizations produced by autistic children aged 5 and older.

Some traits of autism are associated with obvious differences in brain structure, and the scope of these alterations may depend on the person’s sex.