Autism in adults
A lifelong neurodevelopmental difference in social communication and interaction, together with restricted interests, preference for routine and sameness, and sensory sensitivities. Many adults, especially women and high-IQ people, reach adulthood undiagnosed because they have learnt to compensate.
What drives it
Not a defence: it is a different way of processing social, sensory and predictive information. The autistic person relies on explicit rules and predictability because implicit social cues and unexpected change cost more effort to process.
How it shows
Work
Excellent at deep, systematic work; direct and literal in feedback ('That's wrong' rather than 'Interesting, have you thought about…'). Dislikes open-plan noise, surprise meetings and vague briefs. Prefers written instructions. May miss hints and office politics, or decode them by explicit study. Exhausted after social days; needs recovery time.
Relationships
Loyal, honest, sometimes blunt. Needs predictability and alone time; can seem unaffectionate in conventional ways but shows care through acts and shared interests. Partners may feel the person misses emotional subtext; the autistic person often feels criticised for not reading minds.
Self
Social situations feel like working out a puzzle in real time. You have rules you developed for small talk. Certain sounds, textures or lights are genuinely painful. Unplanned change throws your whole day. You often feel you are performing a role others play naturally.
What tells it apart
Social anxiety: Social anxiety is fear of judgement with accurate cue-reading, and it fades with people the person trusts; autistic social difference persists even when fully relaxed, comes with sensory and routine needs, and dates from early childhood.
Schizoid personality: Schizoid people are emotionally detached and indifferent to closeness; many autistic adults want connection but find it confusing or tiring, and show intense enthusiasm for their interests.
ADHD in adults: ADHD seeks novelty and struggles with routine; autism seeks sameness and is distressed by unplanned change. They co-occur frequently, so both can be present.
A test
Look for lifelong patterns (childhood history, sensory sensitivities, need for routine, literal communication, exhaustion after socialising) that persist in relaxed settings; if they are present and the person is struggling, suggest an adult autism assessment by a specialist experienced with masking.
Questions to carry
- In relaxed settings as well as stressful ones, which lifelong patterns show up: around routine, senses, literal meaning, or tiredness after company?
- After a day of socialising, how long do I need to recover, and what am I recovering from?
How strong the research is
strong
Where it comes from
Leo Kanner, 1943; Hans Asperger, 1944; Lorna Wing introduced the spectrum idea and 'Asperger syndrome' in English, 1981; autism spectrum disorder in DSM-5, 2013