What happens during an autism assessment?
What happens during an autism assessment?
Taking the step to arrange an autism assessment, whether for yourself or for your child, often comes with a mixture of emotions. You may feel relieved to be seeking answers, while also feeling anxious about what the assessment day will involve.
Many parents worry about how their child will respond.
What if they refuse to talk?
What if they become overwhelmed?
Will they be judged?
Adults often have different concerns.
What if I've spent years hiding my difficulties?
What if the clinician doesn't see the real me?
The most important thing to know is that an autism assessment is not an exam. There is no 'passing' or 'failing', and nobody is looking to catch you or your child out. It is a structured, supportive process designed to understand how you or your child experiences the world and to identify the support that may be most helpful.
Autism assessment: A quick answer
An autism assessment is a supportive process that helps specialists build a complete understanding of how you or your child experiences the world. Rather than relying on a single test, it combines conversations, developmental history, recognised assessment tools and gentle observation. The aim is not to judge, but to understand individual strengths, differences and support needs so that the right support and recommendations can be provided.
Why have an autism assessment?
An autism assessment is not about placing a label on someone. It is about understanding.
Whether for a child who is finding school or friendships difficult, or for an adult who has spent years wondering why life often feels more exhausting than it seems for other people, a diagnosis can provide clarity and reassurance.
For many people, an assessment offers:
Greater self-understanding – helping explain why you or your child think, communicate and experience the world differently.
Access to appropriate support – enabling schools, colleges, universities or workplaces to make reasonable adjustments.
Validation – recognising that lifelong challenges are real, understandable and not the result of laziness, poor parenting or personal failure.
Understanding often becomes the first step towards moving forward with greater confidence.
Your autism assessment journey
We believe that understanding the process helps reduce anxiety. Here's what you can expect at each stage.
Step 1: Gathering the background
Before your appointment, we'll ask you to complete some questionnaires and gather information about early development and day-to-day experiences.
For children, we may also ask parents, carers or schools to provide information that helps us understand how your child communicates, learns and interacts across different settings.
For adults, we'll explore childhood experiences where possible, but please don't worry if you don't have school reports or someone who can remember your early years. This is very common, and we are experienced in building a complete picture using the information that is available.
Step 2: The clinical conversation
The assessment itself is best thought of as a conversation rather than a test.
For children, this usually involves talking with parents or carers about early development, communication, play, friendships and sensory experiences.
For adults, we'll explore your childhood alongside your current experiences, including work, relationships, routines, sensory differences and everyday life.
Step 3: Direct observation
During the assessment, we'll spend time together using carefully designed activities that help us understand communication, social interaction and behaviour in a natural way.
Assessments take place in our calm and welcoming clinic environment, where we aim to help children and adults feel as comfortable as possible. We understand that unfamiliar environments can sometimes feel overwhelming, so we allow plenty of time for people to settle at their own pace. Children are very welcome to bring a favourite toy, book or comfort item if it helps them feel more relaxed.
There is no expectation that anyone should behave in a particular way during the assessment. We simply want to understand how you or your child naturally experiences the world.
Step 4: Multidisciplinary discussion
At Cross Psychology, assessments are considered by our multidisciplinary team, which may include Clinical Psychologists, Speech and Language Therapists and other experienced professionals where appropriate.
Reviewing the information together helps ensure every assessment is balanced, thorough and consistent with current NICE guidance. Rather than relying on one questionnaire or one observation, we bring together multiple sources of information to build the most accurate understanding possible.
Step 5: Feedback and recommendations
Once the assessment has been completed and reviewed, we'll arrange a feedback appointment to explain the findings clearly and answer any questions you may have.
You'll receive a comprehensive written report outlining the assessment process, the diagnostic outcome and personalised recommendations. These recommendations may include guidance for home, school, college, university or work, along with suggestions for ongoing support where appropriate.
Our aim is not simply to provide a diagnosis, but to help you understand what the diagnosis means in everyday life and what support may be most beneficial moving forward.
The assessment tools we use (in Plain English)
The names of autism assessment tools can sound technical, but they are designed to help clinicians understand people, not test them.
ADOS-2 (Autism Diagnostic Observation Schedule)
The ADOS-2 is not a written exam or an IQ test.
For younger children, it involves play, picture books, toys and simple activities designed to encourage natural communication and interaction.
For older children, teenagers and adults, it becomes more conversational, using structured activities and discussion to explore social communication, imagination and emotional understanding.
ADI-R (Autism Diagnostic Interview – Revised)
The ADI-R is a detailed conversation with a parent or caregiver about early childhood development. It explores areas such as communication, play, routines, sensory differences and developmental history to help build a fuller understanding of how autism characteristics have been present over time.
3Di (Developmental, Dimensional and Diagnostic Interview)
The 3Di is another structured interview that helps clinicians explore developmental experiences in a consistent way. Like all assessment tools, it is simply one part of the overall assessment and is considered alongside conversations, observations and clinical expertise.
What if my child won't join in?
This is probably the most common concern parents have before an assessment.
The good news is that it is completely okay. We are highly experienced in working with neurodivergent children and understand that every child communicates differently.
We do not expect children to sit perfectly still, maintain eye contact or answer every question. If your child prefers to play quietly, needs extra time, becomes upset or simply doesn't want to engage straight away, we will never judge them or you. In fact, seeing how a child naturally responds to unfamiliar situations often provides valuable information that helps us understand their individual profile.
Every child communicates differently, and understanding those differences is one of the purposes of the assessment.
What if I mask my autistic traits?
Many autistic adults - and particularly women and girls - worry that they have spent so many years hiding their natural behaviours that nobody will recognise their autism.
This is known as masking.
Masking is the conscious or unconscious process of hiding autistic traits in order to fit into social situations. It might involve forcing eye contact, rehearsing conversations, copying other people's behaviour or suppressing movements that feel natural.
We understand masking and actively explore it during the assessment. We don't only look at what you do during the appointment, we also explore how much effort it takes to do it and how you feel afterwards.
Many autistic people describe feeling emotionally and physically exhausted after social situations, even when they appear confident on the outside. These experiences are an important part of understanding your individual profile.
Every autistic person is different
There is no single way to be autistic. Some people are highly talkative, while others communicate very little. Some enjoy eye contact, while others find it uncomfortable.
Some rely heavily on routine, while others appear flexible but find change emotionally exhausting.
Our assessment is designed to help you better understand yourself or your child, recognise strengths as well as challenges, and identify the support that will help you move forward with greater confidence.
Frequently asked questions
How long does an autism assessment take?
The direct observation session, such as the ADOS-2, usually lasts between 45 and 90 minutes. However, the complete assessment process also includes developmental interviews, reviewing questionnaires and preparing the final report, so the overall process takes place across several stages.
Is the ADOS-2 an IQ test?
No. The ADOS-2 does not measure intelligence or academic ability.
It focuses on communication, social interaction, imagination and behaviour to help clinicians understand how someone naturally experiences the world.
What if my child is non-verbal or doesn't speak very much?
The assessment tools we use are designed to be flexible.
Specific versions of the ADOS-2 are available for individuals who use little or no spoken language, allowing clinicians to observe communication through gestures, facial expressions, play and other natural interactions.
Will my child have to make eye contact?
No. There is no expectation that a child should make eye contact, sit perfectly still or respond in a particular way. The assessment is designed to understand natural communication and interaction, not how well a child can meet social expectations.
Can adults have a private autism assessment?
Absolutely. Many adults seek an assessment later in life after recognising traits in themselves or following a child's diagnosis. Adult assessments are adapted to explore childhood experiences alongside current work, relationships, sensory processing and everyday life.
Will I receive a diagnosis on the day?
Usually not. Following the assessment, our multidisciplinary team carefully reviews all of the information before reaching a diagnostic decision. We'll then arrange a feedback appointment to discuss the findings, answer your questions and explain the recommendations in detail.
What happens after a diagnosis?
At Cross Psychology, diagnosis is not the end of the journey. We'll explain the findings, provide a comprehensive written report and discuss practical next steps for home, education or work. Where appropriate, we'll also talk through post-diagnostic support and other services that may help you or your child continue to thrive.
About the author: Reviewed by Dr Zoe Cross, DClinPsy, CPsychol, is a Clinical Psychologist and founder of Cross Psychology. She specialises in neurodivergent conditions including ADHD, autism and cognitive differences such as dyslexia and dyscalculia in children, young people and adults. Zoe is regulated by the Health and Care Professions Council (membership number PYL24596)
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