Repetitive behaviors such as hand-flapping and spinning may give autistic people a sense of control; instead of discouraging these behaviors, therapists should address triggers upsetting to autistic people.

The timing of treatment is crucial for conditions related to autism — and more so for some conditions than for others.

Adults with autism tend to have a different set of psychiatric conditions than do those with attention deficit hyperactivity disorder.

Genes associated with autism are ancient, and mutations in them have wide-ranging effects on the body, indicating their importance.

Many young autistic people with signs of emerging psychosis go without appropriate care.

The lack of people with intellectual disability in studies of autism has a profound effect on our understanding of the condition.

Clinicians need a more consistent and evidence-based approach to prescribing antipsychotics to children and adolescents with autism.

The signaling imbalance theory holds that the brains of autistic people are hyper-excitable because of either excess neuronal activity or weak brakes on that activity.

One of the leading theories of autism posits that girls and women are biologically protected from the condition.

The ‘extreme male brain’ theory suggests that autism is an exaggeration of systematic sex differences in ways of thinking.