Signs of Autism in Adults:
What to Look For & How to Get Assessed
Many Australians don't receive an autism diagnosis until adulthood — sometimes not until their 30s, 40s, or beyond. If you've found yourself wondering whether you might be autistic, this guide walks you through what to look for and how to seek an assessment.
Why Are Some People Diagnosed With Autism Late in Life?
Several factors explain why autism often goes undetected until adulthood:
- Masking — many autistic people, particularly women, learn to imitate social behaviours, hiding their autism from others and sometimes from themselves
- Changing diagnostic criteria — autism was less understood in previous decades and many people were simply never assessed
- High-functioning presentations — individuals with strong verbal abilities may manage until greater social or professional demands reveal their challenges
- Misdiagnosis — anxiety, depression, OCD, or ADHD sometimes mask underlying autism
A late diagnosis, while it may come with mixed emotions, can be profoundly validating — finally understanding why life has always felt more complicated than it seemed to for others.
Key Signs of Autism in Adults
Social Communication
Taking language literally, struggling with unspoken rules, finding small talk exhausting, preferring structured one-on-one interaction.
Sensory Sensitivities
Strong reactions to sounds, lights, textures, smells or tastes — feeling overwhelmed in busy environments.
Routines & Interests
Deep intense interests, strong preference for routines, distress at unexpected changes, repetitive movements (stimming).
Other common signs include difficulty identifying your own emotions (alexithymia), high rates of anxiety or burnout, and a lifelong feeling of being "different" without being able to explain why.
e-Doctor can help you take the first step toward an assessment.
Autism in Women & Girls
Research increasingly shows that autism presents differently in women and girls — and that traditional diagnostic criteria were largely based on male presentations. Autistic women are more likely to mask their difficulties and receive misdiagnoses such as borderline personality disorder or eating disorders before their autism is recognised.
If you are a woman who relates to many of the signs above but have been told you "don't seem autistic", it may be worth seeking a specialist who understands female autism presentations.
How Is Autism Diagnosed in Adults in Australia?
There is no single test for autism. A comprehensive assessment typically involves:
- Detailed developmental history — covering childhood, school, work, and relationships
- Standardised assessment tools — conducted by a psychologist or psychiatrist
- Questionnaires and self-report measures — often including input from family members or partners
- Comprehensive written report — outlining findings, diagnosis, strengths, and recommendations
What Happens After a Diagnosis?
A diagnosis opens the door to appropriate support, accommodations, and community. You may be eligible for NDIS funding, workplace adjustments, and tailored mental health services. Most importantly, you will have a framework to better understand yourself, your needs, and your strengths.
