What is autism, and what does "spectrum" mean?
The word comes from the Greek for "self", and "spectrum" does not mean a line from mild to severe.
▶ Start the storyAutism, also called autism spectrum disorder, is a condition. People describe it as differences in social communication and interaction, together with a strong preference for routine and predictability, sensory processing differences, focused interests or repetitive behaviours. These features show up in early childhood and typically last throughout life.
The word "spectrum" is easy to misread. It does not mean a single line running from "a little autistic" to "very autistic". Presentations vary, and support needs range from minimal assistance to full-time, round-the-clock care. The spectrum concept is meant to signal diversity rather than a simple range from mild to severe. Two autistic people can look very different from one another.
A common misreading
- One line from "mild" to "severe"
- Everyone sits at one point on it
What specialists say
- Diversity, not a simple range
- Support needs run from minimal to full-time care
For a diagnosis under the American manual DSM-5-TR, professionals look at two areas: social communication and interaction, and a pattern of restricted and repetitive behaviours, which means at least two of repetitive behaviours, resistance to change, focused interests and sensory reactivity. A diagnosis also requires an assessment by a professional that these features cause significant challenges in daily life.
Even the wording is debated. Some people prefer "autistic person", which treats autism as part of identity, while others prefer "person with autism". The autistic rights movement encourages the form, and there is disagreement within the autism community. This lesson uses "autistic people" and respects either choice.
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Recap
Spectrum means diversity, not a line from mild to severe, and support needs range from minimal to round-the-clock.
💡 A trick to remember it · A spectrum is more like a colour wheel than a dimmer switch: many different hues, not just brighter or dimmer.
Surprising fact · The word autism was coined in 1911 from the Greek for "self", for a symptom of schizophrenia.
Connects to
- 🧠 What is ADHD, and how do doctors describe it?
- 👶 How do babies learn a language nobody explains to them?
- Neurodiversity
- History of autism
Sources (2)
No source, no claim. Every fact in this lesson (11 claims) cites at least one of these.