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Getting diagnosed with autism as an adult

If you suspect you might be on the autism spectrum, then you might have wondered, how do I get diagnosed with autism as an adult?

Date posted: Author: Christine Hawkett, Plan Manager

Seeking a formal assessment can be empowering. It can bring clarity, helps you access support, and helps you better understand yourself.

By virtue of the condition, the diagnostic process can feel daunting and overwhelming. But it's vital to remember that getting a diagnosis as an adult can be highly impactful. Here's your roadmap to getting started!

Step 1: Reflection and understanding

Why now?

What made you suspect you have autism? Think about patterns of your own behaviour and challenges you’ve experienced now and when you were younger. Also, reflect on things that others have told you about yourself.

Having an idea of these clues and signs will help you articulate your thoughts to professionals. If there’s a lot, it might help to write them down or map them out with a diagram.

Research reputable sources

Start looking into information online but be careful about the source. Make sure you visit the websites of organisations with a good reputation like Autism Spectrum Australia or if you live in South Australia Autism SA.

You can also read academic studies on adult autism. Many are publicly available through Google Scholar.

During your desktop research, pay close attention to common traits present in people with autism. However, keep in mind that the absence or presence of these in yourself is not definitive.

Online self-assessments

While not to be used as a diagnosis, questionnaires can offer useful insight. Avoid 'pop quiz' style ones and opt for ones from respected mental health sites.

Step 2: Seek initial professional consultation

Finding the right fit

For obvious reasons, it's best to work with a practitioner who is experienced in adult autism assessment.

There are several ways to find such a practitioner. Ask your GP, search online directories, or reach out to autism-specific health groups for recommendations. Some websites even let you check reviews of a certain practitioner, and sites like Reddit may have other forms of testimony.

The bottom line is simple: do your research! If the process is going to cost money, you want it to be worthwhile.

Your first appointment

Once you’ve found a practitioner, the assessment process can begin.

Arrive at your first appointment prepared to openly discuss past and present struggles and successes. You’ll likely be asked to share your observations of how your brain works.

It can be hard to open up to a stranger, but it’s their job to help you, not judge you. Honesty matters here - it will help you get the most accurate outcome.

Be specific

If you’ve received previous diagnoses (such as anxiety and ADHD), you should mention this. Yes, it’s possible to have both, but this information will help your practitioner tailor their approach.

If you doubt the accuracy of these diagnoses, you should let your practitioner know. They may be able to help clear up any doubt or amend your diagnosis if needed.


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Step 3: The assessment process

No single path

    Autism is a complex condition. It’s not always possible that a single practitioner is going to have enough expertise in every area of your functioning to be a one-stop shop for a diagnosis.

    Be prepared for the diagnostic process to involve multiple health professionals. Think psychologists, psychiatrists, occupational therapists, and so on.

    Developmental history

      Practitioners will likely ask you to delve into childhood memories, school experiences, and how social situations feel to you. As such, you may need to confront some distressing parts of your life.

      Support and input from your loved ones can be vital too; your practitioner may request that a family member or close friend comes to a session.

      Observation and tools

        Behavioural observation is an important part of many diagnostic processes. Here, practitioners will observe you during clinical interviews and while using standardised assessment tools. These observations, along with your responses to questions, will be used to form a whole picture of your place on the spectrum.

        Step 4: The diagnostic decision

        Understanding the report

          Following assessments, professionals provide a detailed report, usually both written and with a feedback discussion. Take the time to read the report a couple of times and be sure to ask questions about anything that gives you pause. You might like to share it with a loved one who can support you.

          The spectrum

            Keep in mind, diagnoses often go beyond "yes" or "no”. This is especially true for autism, which exists on a spectrum.

            If the practitioner feels you do have autism, you’ll receive the “yes”, but also some discussion about where on the spectrum you fall.

            Co-occurring conditions

              Many adults with autism deal with other challenges, such as anxiety, depression, and sensory processing differences. These might need to be explored if your practitioner is to recommend the right supports for your needs.

              Important considerations once autism has been diagnosed

              Finding support

                Seeking a community of peers with autism (regardless of a formal diagnosis) can provide valuable insight and strategies as you navigate this journey. Searching Facebook, Reddit, or meet-up sites for communities is a good starting point.

                Also, finances permitting, consider ongoing therapy. This may help you overcome trauma, whether its related to your autism or not. It’s never a bad idea to work on yourself!

                Adjusting expectations

                  The assessment process shouldn’t be rushed. Specialists need time to properly analyse information and work collaboratively. We know it can be an anxious wait for an answer, but expecting a longer turnaround is key to reducing the emotional burden on yourself.

                  Self-advocacy

                    Advocating for yourself means standing up for yourself. If your concerns aren’t taken seriously, or if assessment results feel wrong, don’t be afraid to seek a second opinion.

                    Seeking clarity – it’s worth the effort

                    Navigating the road to an adult autism diagnosis takes time and persistence. Yet, for many, this knowledge is incredibly affirming. It helps you tailor personal strategies, connect with community, and find appropriate services. Taking the first step help paves the way towards unlocking understanding, acceptance, and a life lived on your own terms.

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