Autism assessment: Show how the conclusion was reached - Guide
Home, school and clinic can each see a different part of a person's life. The assessment needs to investigate the differences and explain how they affect the conclusion.
A teacher describes a child who completes classroom work. A parent describes a long period of distress after school. During an assessment appointment, the child appears comfortable. These hypothetical accounts may concern different activities, different demands and different parts of the day. Deciding which observer is the most convincing before examining that context can lose clinically useful information.
The purpose of an autism assessment is to reach a reasoned conclusion from the relevant evidence. It should be possible to follow that reasoning when accounts conflict. Families and educators do not need to agree on a diagnosis beforehand, and the person being assessed should not have to perform distress to make a concern worth investigating.
Start with what each person actually observed
Broad descriptions such as managing well or struggling everywhere conceal important detail. Ask what the activity involved, when it occurred, how long it lasted and what happened. An account of completing a familiar task with one trusted adult answers a different question from an account of managing a noisy group or an unexpected change.
Separate direct observation from information passed on by someone else. Record the person's explanation where available, and distinguish it from an adult's interpretation. A clear example might describe how a child began an activity, the help provided and what followed. There is no need to turn every day into an observation exercise; ask the assessor which examples would answer the referral question.
Make the conditions and assistance visible
Successful participation is valuable evidence. Explain the conditions that accompanied it: preparation, a predictable routine, written instructions, movement breaks, communication supports or another person's prompting. These details may help identify what works and why a less supported setting is harder.
Keep helpful support in place. Removing it to demonstrate difficulty can create an avoidable problem and still fail to explain ordinary functioning. Similarly, do not select only the hardest moments. An assessment needs enough variation to understand strengths, exceptions and the situations in which assistance matters.
Putnam and colleagues examined parent and teacher ratings for 388 autistic young people aged 4–17. Parents of girls reported more autistic traits than teachers across several domains. This observational analysis of an already-diagnosed sample cannot determine the cause of an individual discrepancy or prove masking. Putnam et al., published online 2024.
Explore masking without assuming it
Camouflaging or masking may be relevant when a person describes deliberately monitoring, rehearsing or suppressing aspects of their behaviour. Ask what they experience, in which situations and with what consequences. Use communication that works for them and allow time; a person may find it difficult to explain a process that has become familiar.
A difference between settings does not establish that explanation on its own. The effort involved in an activity and the time and support needed to recover afterwards may be important to record. Its cause still requires consideration. A change in sleep, pain, anxiety, environmental demands or other concerns may warrant attention alongside the autism question. Acknowledging an experience and investigating its explanation can happen together.
Ask what further information would change the conclusion
NICE's UK child autism guideline recommends considering further information or observations in other settings when reported features differ from clinic findings. This is clinical guidance, not an Australian legal requirement or a direction for every family to arrange a school observation. NICE CG128.
Further enquiry should have a purpose. Perhaps accounts concern different periods, a questionnaire item was understood differently, or an important source had too little opportunity to observe the relevant behaviour. Ask which unresolved issue matters to the decision and what additional information could clarify it. Collecting more forms without identifying that question can add work without improving the explanation.
Make the reasoning understandable
Australia's 2023 National Guideline calls for an explanation of clinical reasoning and remaining ambiguity, with opportunities to ask questions. It also cautions against basing diagnosis solely on standardised instruments. These are consensus-based recommendations for practice. National assessment and diagnosis guideline.
A useful report should make clear why some evidence is more informative for a particular question. A detailed school observation may illuminate group participation; a developmental account may describe a longstanding pattern that an appointment cannot capture. Sources need not receive equal weight, but the reason for the weighting should be visible. Simply averaging discrepant scores or choosing the most convenient account avoids that task.
The explanation should address information that challenges the conclusion as well as information that supports it. Ask how diagnostic criteria, developmental history, alternative explanations and possible co-occurring conditions were considered together. Whether autism is established, is not established or remains uncertain, the explanation should make its limits clear.
Translate the finding into a practical next step
For families and educators, the useful endpoint is understanding what to do next. For allied health professionals, a report should identify the functional question a proposed support addresses. If the report is used in an NDIS or legal context, readers still need the specific evidence relevant to that decision; a diagnostic label does not answer every question about support or entitlement.
Ask for the main conclusion in accessible language, what remains unresolved and whether review is recommended. Share records only through appropriate confidential processes and with the relevant consent. To discuss an assessment enquiry, contact Redefini Therapies. This article is general information and cannot determine an individual diagnosis, support plan or funding outcome.
Source 1
Putnam, McFayden and Harrop (2024 online). Sex Differences and Parent–Teacher Discrepancies in Reports of Autism Traits. Journal of Autism and Developmental Disorders.
Read source
Observational ratings from 388 autistic young people aged 4–17. Discrepancy does not establish an individual cause.
Source 2
NICE. Autism spectrum disorder in under 19s. CG128.
Read source
UK clinical guidance on further information when accounts differ. Not an Australian legal requirement.
Source 3
Goodall et al. (2023). National Guideline for the assessment and diagnosis of autism in Australia. Autism CRC.
Read source
Consensus-based recommendations. Diagnostic tools contribute to, rather than replace, clinical reasoning.
Download your free guide:
Ready to Take the Next Step?
Reaching out does not commit you to anything. It's an opportunity to ask questions and find out whether Redefini Therapies is a good fit. Helpful to bring: your referral question, any existing reports, and questions about fees & availability.
What to Bring?
To help your testing session run smoothly, please bring the following items with you: Water and Snacks, Aids and Supports, Reports and Documents, and Comfortable Clothing.
Want the full picture?
This is just a glimpse. The complete guide also answers frequently asked questions, including: "Can I fail the assessment?", "Will I definitely receive a diagnosis?", and "Can my report be used for NDIS?"
Redefini Therapies provides psychological assessment and therapy for children, adolescents and adults. Areas of clinical focus include autism, ADHD, intellectual functioning, learning, executive functioning, emotional wellbeing and the practical effects of disability and neurodivergence.
📞 07 3506 0140 | ✉️ admin@redefini.com.au | 🌐 www.redefini.com.au