Kinds of autism, and how it shows up differently

Since 2013 there is officially one diagnosis — autism spectrum disorder — rather than the separate labels that came before. But families still meet the old terms, and real differences between autistic people matter enormously in practice.

The older labels you'll still hear

TermWhat it meantWhere it stands now
Asperger's syndromeAutism without a language delay, often with average or above-average IQFolded into autism spectrum disorder in 2013. Some adults still use it for themselves; others avoid it because of Hans Asperger's documented ties to Nazi-era programmes.
PDD-NOS"Pervasive developmental disorder not otherwise specified" — a catch-all for children who didn't fit neatlyNo longer diagnosed. Older children may still carry the label on paperwork.
Classic / Kanner's autismEarly-onset autism with significant language and learning differencesNow described through support levels and co-occurring conditions rather than a separate diagnosis.
Childhood disintegrative disorderMarked loss of skills after several years of typical developmentVery rare. Folded into the spectrum; regression of skills is now recognised as something that happens to a subset of autistic children.
Rett syndromeA specific genetic condition, mostly in girls, once grouped with autismNow separate, with its own genetic cause and medical care pathway.
"High" and "low functioning"Informal shorthand for perceived abilityWidely rejected — including by most autistic adults — because it overstates the abilities of one group and erases the strengths of the other. Describe the specific support needed instead.

Profiles you'll recognise in real children

None of these are diagnoses. They're patterns that help parents make sense of what they're seeing.

The child who speaks a lot but struggles socially

Fluent, articulate, sometimes strikingly knowledgeable — and still lost in the social rules of a playground. Because speech is intact, support is often denied on the grounds that they're "doing fine academically." Anxiety, exhaustion after school, and meltdowns that only happen at home are the usual signs that they are not.

The non-speaking or minimally speaking child

Roughly a quarter to a third of autistic people use little or no speech. Non-speaking is not the same as having nothing to say and is not a measure of intelligence. Augmentative and alternative communication — picture systems, sign, speech-generating devices, typing — should be introduced early. Research is consistent that AAC does not stop speech from developing; if anything it supports it.

Autistic girls and the missed-diagnosis problem

Girls are diagnosed later and less often, partly because diagnostic criteria were built on studies of boys. Interests may look socially typical on the surface — animals, books, a band — but are pursued with autistic intensity. Social difficulty may be hidden by copying a friend closely. Many are diagnosed with anxiety or an eating disorder first, and identified as autistic only in adolescence or adulthood.

The child with high support needs

Requires substantial daily help with communication, safety and self-care, often alongside intellectual disability, epilepsy or self-injury. These families need practical things — respite, waiver funding, safety equipment, skilled behavioural and medical support — and often feel talked over in public conversations about autism. Their needs are not in competition with anyone else's.

The late-identified parent

It is very common for a parent to recognise themselves partway through their child's evaluation. Autism is substantially heritable. Adult diagnosis is expensive and hard to access, and a lot of people stop at self-identification, which the autistic community broadly accepts.

Regression

Some children develop words and social skills and then lose them, usually between 15 and 30 months. This is a real and documented pattern, and it is frightening to live through. It is not caused by anything you did, and the timing coincidentally overlaps with the routine vaccination schedule — which is a large part of why a false link took hold.