Autism in adults often goes unrecognised for years. Many people reach their 30s, 40s or later before someone suggests they might be autistic. Some work it out themselves after reading or hearing others describe their experiences.
This article explains common signs, why masking can hide autism, and how an adult assessment works in Australia. We use identity-first language (autistic person), which many autistic people prefer. Some people prefer person-first language, and both choices deserve respect.
मुख्य बिंदु
- Many autistic adults were not identified as children, particularly women and people who mask.
- Autism involves differences in social communication, plus focused interests, routines or sensory differences.
- Masking means hiding or compensating for autistic traits, and it can be exhausting.
- Australia’s national guideline describes a clear process for adult autism assessment.
- An assessment should explain your strengths and support needs, whatever the outcome.
Why many autistic adults are identified later
Understanding of autism has changed a lot over the past few decades. Many adults grew up at a time when autism was thought to look one particular way, usually in young boys with obvious support needs.
द ऑस्ट्रेलियाई सांख्यिकी ब्यूरो reports that in 2022, 3.1% of Australians under 25 were autistic, compared with 0.3% of people aged 25 and over. This gap is likely to reflect, at least in part, older autistic people who have never been identified. The ABS also found that the rate of autism among females rose by 95.5% between 2018 and 2022.
हेल्थडायरेक्ट notes that about 3 times more males than females are diagnosed. It adds that autistic girls and women may be better at hiding their traits by copying how others behave in social situations.
Common signs of autism in adults
Autism is diagnosed when a person has differences in two broad areas, starting from early childhood:
- Social communication and interaction. For example, finding small talk confusing, preferring direct communication, or finding it tiring to read facial expressions and unwritten social rules.
- Focused interests, routines and sensory differences. For example, deep and lasting interests, a strong need for predictability, or being very sensitive to noise, light, textures or smells.
Healthdirect lists signs that some autistic adults notice, including:
- strong sensitivity to noises or lights
- feeling isolated from peers or colleagues
- taking words and ideas literally
- close attention to detail
- anxiety in social situations or difficulty with conversations
- a preference for time alone
- becoming overwhelmed easily
Every autistic person is different. Many also describe strengths, such as deep knowledge in areas of interest, honesty, loyalty and noticing patterns others miss.
You may have heard the term Asperger’s syndrome. हेल्थडायरेक्ट explains that this term is no longer used, and people who would once have received it are now diagnosed with autism spectrum disorder.
What masking is and why it matters
Masking (also called camouflaging) means hiding autistic traits or working hard to appear non-autistic. A 2017 study of 92 autistic adults by Hull and colleagues described it in detail. People described:
- Masking: hiding behaviours such as stimming (repetitive movements that help with regulation) and controlling facial expressions
- Compensation: learning explicit rules, such as when to make eye contact or which questions to ask, and preparing scripts for conversations
- Assimilation: trying to blend in to avoid being judged or treated badly
People said they masked to fit in, to keep jobs and to connect with others. They also described real costs. Masking was mentally, physically and emotionally draining. Some felt unsure of who they really were. The study also found that masking can delay recognition of autism.
For example, a person might seem relaxed at work all day, then need hours alone in a quiet room to recover. That recovery time can be an important clue.
How adult autism assessment works
Australia has a National Guideline for the assessment and diagnosis of autism, published by Autism CRC. Its information for adults describes three parts:
- Assessment of functioning. A detailed look at your abilities, strengths and support needs, including thinking skills, language, daily living, relationships and work or study.
- Medical evaluation. A check for physical or medical causes that might explain what you are experiencing.
- Diagnostic evaluation. Standardised questionnaires, clinical interviews and observation to see whether autism is the most likely explanation.
The guideline says a good assessment considers all possible explanations. It also says you should receive a written report and have it explained to you in a meeting.
Healthdirect notes that adults are usually assessed by a psychiatrist or psychologist. The guideline suggests talking to your GP or primary health worker as a starting point, and many private practices also accept self-referrals.
What the clinician is looking for
Clinicians in Australia use the DSM-5-TR, a diagnostic manual, to decide whether someone is autistic. Raising Children Network summarises the key points. The person needs differences in both social communication and in repetitive behaviours, focused interests or sensory responses. These characteristics must have been present from early childhood, even if nobody noticed them at the time.
The clinician will also describe the level of support you need. There are three levels, from needing support to needing very substantial support. Support needs can also differ between situations. For example, a person might manage well in a familiar job but find social events, noisy places or sudden changes very demanding.
Possible outcomes
Some adults receive a clear diagnosis of autism. Others learn that their experiences are better explained by something else, such as anxiety, ADHD, trauma or a mix of factors. Either way, the assessment should describe your strengths and needs and suggest practical next steps.
What can help your assessment
- notes about your experiences in childhood and now, with examples
- school reports or early health records, if you have them
- a parent, sibling or older relative who can describe your early years
- a partner or close friend who can describe how things are now
If you cannot get childhood information, an assessment can still go ahead. Tell the clinician so they can plan for it.
Autism, ADHD and mental health
Autistic adults may also have other conditions. Healthdirect notes that anxiety is common. Some people are both autistic and have ADHD, which is sometimes called AuDHD.
Long periods of masking and stress can contribute to exhaustion. Our article on autistic burnout explains this in more detail.
If you are finding things very hard or having thoughts of suicide, please reach out. If you are in danger, call 000. For 24-hour crisis support call Lifeline on 13 11 14.
Invictus Health कैसे मदद कर सकता है
Our psychologists and neuropsychologists provide adult autism assessments, and you can self-refer. If you also wonder about ADHD, our ADHD and autism assessments page explains the options for looking at both.
After an assessment, some adults want practical help with work or study. Some of our psychologists and counsellors work with neurodivergent adults. You can use our find a practitioner page to choose someone who suits you. You can also read about life after an adult diagnosis. Fees are on our शुल्क और छूट पृष्ठ।.
This article is general information only. Please speak with a qualified health professional about your own situation.
अक्सर पूछे जाने वाले प्रश्न
Can you be diagnosed with autism as an adult?
Yes. Autism can be diagnosed at any age. Autistic traits are present from early childhood, but they may not be recognised until much later, especially if a person has learned to mask. Adults are usually assessed by a psychologist or psychiatrist using interviews, questionnaires and information about their early development.
What does autistic masking look like?
Masking can include copying other people’s expressions, forcing eye contact, rehearsing conversations, hiding stimming and following learned social rules. From the outside, a person may seem to cope well. Inside, they may be working very hard and feel drained afterwards. Needing a lot of recovery time after social situations can be one sign.
Do I need a GP referral for an adult autism assessment?
Not always. The national guideline suggests your GP as a helpful starting point, and a GP can check for medical causes. However, many private practices accept self-referrals. A referral may matter if you want a Medicare rebate for a specialist such as a psychiatrist. Check with the practice you plan to use.
Is it worth getting an autism diagnosis as an adult?
That is a personal choice. Some adults find that a diagnosis helps them understand themselves and make sense of past experiences. It can also help when asking for adjustments at work or study. Others choose not to pursue one. An assessment can give you clear information to make that choice.
What is the difference between autism and Asperger's?
Asperger’s syndrome was once a separate diagnosis. It is no longer used. People who would previously have been diagnosed with Asperger’s are now diagnosed with autism spectrum disorder. Some people who received the older diagnosis still use the term to describe themselves, and that is their choice.
Thinking about an autism assessment?
You can self-refer for an adult autism assessment with Invictus Health. Contact us if you have questions first.
संदर्भ
- Autism CRC. Information for adults seeking an assessment. National Guideline for the assessment and diagnosis of autism in Australia; 2023. autismcrc.com.au/best-practice/assessment-and-diagnosis/f…
- Healthdirect Australia. Autism spectrum disorder (ASD). Healthdirect; reviewed 2025. healthdirect.gov.au/autism
- Healthdirect Australia. Autism spectrum disorder (ASD). Healthdirect. healthdirect.gov.au/autism
- Hull L, Petrides KV, Allison C, et al. “Putting on my best normal”: social camouflaging in adults with autism spectrum conditions. Journal of Autism and Developmental Disorders; 2017;47(8):2519-2534. link.springer.com/article/10.1007/s10803-017-3166-5
- Australian Bureau of Statistics. Autism in Australia, 2022. ABS. abs.gov.au/articles/autism-australia-2022
- Raising Children Network. DSM-5-TR and autism diagnosis. Raising Children Network; reviewed 2024. raisingchildren.net.au/autism/learning-about-autism/asses…
Questions about this topic?
Our team is happy to talk through your situation and help you find the right next step.