Assessment · Adults 18+
Adult Autism Assessment
Many adults come to wonder whether autism explains long-standing patterns: feeling overwhelmed in busy environments, exhausted after social situations, needing more time to process information, or working hard to meet expectations that don't always feel natural.
A formal assessment can offer clarity, whether the assessment supports a diagnosis, suggests another explanation, or provides a clearer understanding of your current experiences.
Your assessment package includes
- Comprehensive assessment process delivered across four 60-minute assessment sessions and a 50-minute feedback session
- Review of developmental history
- Review of available documentation (e.g. school reports, previous reports), where available
- Standardised autism assessment measures
- The MIGDAS-2 (Monteiro Interview Guidelines for Diagnosing the Autism Spectrum) diagnostic interview
- Collateral information, where appropriate and with your consent
- Consideration of differential diagnoses and co-occurring presentations
- Comprehensive clinical formulation
- Comprehensive written report
- Personalised recommendations
The assessment also considers other factors that may contribute to similar experiences, helping ensure conclusions are based on a comprehensive clinical evaluation rather than questionnaires alone. Where clinically indicated, the ADOS-2 (Autism Diagnostic Observation Schedule) may also be offered as an additional observational assessment alongside the MIGDAS-2 interview, to further support diagnostic clarity. This will always be discussed with you before proceeding, and no additional fees will be incurred without your agreement.
What this looks like in practice
Your first two sessions focus on understanding your history, developmental, educational and clinical, along with standardised questionnaires and rating scales. Sessions three and four use the MIGDAS-2, a conversation-based diagnostic interview, exploring areas including sensory experiences, social communication and interests, with particular attention to internalised or masked presentations that may be less readily recognised.
Collateral information, from a partner, family member, or someone else who knows you well, can add valuable context, and is included with your consent where appropriate.
If the ADOS-2 is recommended as an additional observational assessment, this will be discussed with you and explained clearly before proceeding, along with what it adds to the overall picture.
Your final session brings all of this together into a feedback appointment, where we walk through your written report and discuss personalised recommendations.
Who this is for
Adults who:
- Have wondered whether autism explains long-standing patterns in social communication, sensory processing, or the need for routine and predictability
- Want a formal, evidence-based process to better understand themselves
- Have been referred by a GP, psychologist, or other health professional
- Are seeking documentation for personal understanding, workplace adjustments, study support, NDIS, or other personal, educational or occupational needs
Currently offered for adults only. Assessments for adolescents are not yet available; get in touch if you'd like to be notified when this changes.
What to expect
Initial contact
Get in touch to discuss whether this assessment is the right fit for what you're looking for. As part of this, I'll ask what you're hoping to use the assessment for (personal understanding, workplace, study, NDIS, or a specific organisation's requirements), so we can discuss anything relevant before booking.
Booking
After our initial conversation, if the assessment feels like the right fit, we'll book in your first session. All five sessions are typically scheduled together to help secure consistent timing, though this can be adjusted if needed.
Assessment sessions
Five sessions in total: four 60-minute sessions covering your clinical interview, history review, and the MIGDAS-2 diagnostic interview, followed by a 50-minute feedback session. If the ADOS-2 is recommended, this may add an additional session.
Report and feedback
Reports are typically completed within 2-3 weeks of your final assessment session. You'll receive a comprehensive written report, along with a session to discuss the findings together.
Fees
This fee includes all five assessment sessions, review of relevant history and supporting documentation, standardised assessment measures, the MIGDAS-2 diagnostic interview, a comprehensive written report, personalised recommendations, and a feedback appointment.
Where an additional assessment session or the ADOS-2 is clinically indicated, this will always be discussed with you before proceeding ($220 per additional session). No additional fees will be incurred without your agreement.
Adult autism assessments are generally not eligible for a Medicare rebate. If you have any questions about your individual circumstances, please feel free to get in touch.
Payment arrangements will be provided when your assessment is booked.
Considering an ADHD assessment too?
If your assessment indicates that ADHD may also warrant further exploration, we can discuss arranging a separate ADHD assessment if you wish to pursue formal assessment for both. Clients completing both the Autism and ADHD assessments receive $400 off the second assessment.
Terms: the $400 discount applies where both the Adult ADHD Assessment and the Adult Autism Assessment are booked and completed with Tranquil Psychology Perth, and is applied to the fee for whichever assessment is completed second. Both assessments must be booked within 12 months of each other. The discount applies to the assessment fee only and does not apply to additional assessment sessions, cognitive assessment, or the ADOS-2. Not available in conjunction with any other offer.
Frequently asked questions
Ready to take the next step?
If you're unsure whether this assessment is right for you, you're welcome to get in touch first, and we can talk it through before you book anything.