Autism Spectrum

What is Autism?

Autism Spectrum Disorder (ASD) — or simply "autism" — is a neurodevelopmental condition that affects how a person experiences and interacts with the world. Autistic people process social information, sensory input, and routine differently from non-autistic (neurotypical) people.

The word "spectrum" often leads people to imagine autism as a simple dial from mild to severe. The reality is far more nuanced. Autism varies across multiple dimensions simultaneously — social communication, sensory processing, executive function, repetitive behaviours, and language — and a person might need significant support in some areas while being highly independent in others.

Previously, the DSM-IV used separate diagnoses such as Autistic Disorder, Asperger syndrome, and PDD-NOS. The DSM-5 (2013) consolidated these into a single ASD diagnosis with severity levels (1–3) based on support needs. Many people previously diagnosed with Asperger syndrome continue to use that label as part of their identity.

How It Presents

Autism presents differently across ages, genders, and individuals. Common features include:

Social communication differences:

• Differences in understanding implicit social rules and cues
• Preference for direct, explicit communication
• Differences in eye contact (not an absence of social interest — autistic people often care deeply about others)
• Difficulty with unwritten social conventions and small talk

Sensory processing:

• Hyper- or hypo-sensitivity to sound, light, texture, smell, taste, or touch
• Sensory overload can cause significant distress and shutdown or meltdown
• Proprioceptive and vestibular differences (body awareness, balance)

Routine and predictability:

• Strong preference for consistency; change can be highly distressing
• Detailed, intense interests (sometimes called "special interests") that bring deep joy and expertise

Masking: Many autistic people — especially women, girls, and gender-diverse individuals — learn to suppress or hide autistic traits to appear neurotypical. This is exhausting and is strongly associated with burnout, anxiety, and depression.

Late diagnosis: Many autistic people are not diagnosed until adulthood, often after a lifetime of feeling different and struggling in environments not built for them.

Assistive Technology

• AAC devices — many autistic people are non-speaking or intermittently speaking; AAC (from low-tech picture boards to high-tech SGDs) provides communication access
• Noise-cancelling headphones — manage sensory overload in loud environments
• Visual schedules and timers — support predictability and transition management
• Weighted blankets and sensory tools — provide proprioceptive input that many autistic people find regulating
• Text-based communication — many autistic people communicate more easily through text than speech
• Accessibility overlays and reading tools — for those with co-occurring dyslexia or ADHD

Common Misconceptions

• "Autistic people lack empathy." Autistic people often feel empathy intensely — the difference is in how it is expressed and recognised. This misconception causes real harm.
• "Autism is caused by vaccines." This claim originates from a fraudulent 1998 study that was retracted. Decades of research across millions of children have found no link.
• "Autistic people cannot have relationships, jobs, or families." The autistic community is diverse; many autistic people have rich relationships, careers, and families.

Language and Identity

Identity-first language ("autistic person") is strongly preferred by the majority of the autistic community, including most autistic-led organisations. "Person with autism" (person-first) is preferred by some parents and some professionals but is actively rejected by many autistic self-advocates, who see autism as inseparable from who they are.

"High-functioning" and "low-functioning" are problematic terms that flatten complex needs and erase important realities: "high-functioning" people can have significant unmet needs, while "low-functioning" labels can deny agency and potential.