If you’re thinking about how to prepare for an autism or ADHD assessment, there’s a good chance you’ve already started second-guessing yourself.
Will I forget something important? What if my mind goes blank? What if I struggle to explain experiences I’ve had for years?
Those worries are incredibly common.
The good news is that while an assessment doesn’t need perfectly organised notes, a little preparation can make the process feel much less stressful and help you share the information that gives clinicians the fullest understanding of you or your child.
This guide covers what to gather before your appointment, what information clinicians find useful, and how to approach the assessment with confidence.
What clinicians are looking for in an autism or ADHD assessment
Clinicians need to gather information from different parts of your life to understand whether ADHD, autism, (or both) provide the best explanation for your experiences. Essentially, this includes what life looks like today and what it looked like during childhood.
For ADHD, discussions often focus on areas such as attention, organisation, impulsivity, emotional regulation, time management, and how these affect daily life at school, work, home, or in relationships.
For autism, clinicians may ask about communication, social interaction, routines, sensory experiences, special interests, and how you process information and situations around you.
They’ll also want to understand the impact these experiences have had over time.
For example:
- How do you or your child cope with busy environments?
- What happens when plans change unexpectedly?
- How easy is it to stay organised?
- How much effort does social interaction take?
- How do you or your child manage deadlines, routines, or everyday responsibilities?
Of course, many people develop ways of coping that make difficulties less obvious to other people. Some rely heavily on reminders, routines, family support, masking, or sheer determination to get through the day.
These coping strategies are useful information too.
The more examples you can share from different stages of your life, the easier it becomes for clinicians to build an accurate understanding of your experiences.
Start by writing down real-life examples
One of the easiest ways to prepare for an autism or ADHD assessment is to start making notes before your appointment. You don’t need pages of detailed information. A few real examples are often far more useful than general statements such as “I struggle socially” or “I find it hard to concentrate.”
Think about situations that happen regularly. What causes frustration? What takes more effort than it seems to for other people? What do friends, family members, teachers, colleagues, or partners comment on?
If you’re not sure where to start, these areas can help jog your memory:
Home and daily routines
Consider things such as:
- Managing household tasks
- Following routines
- Sleep difficulties
- Sensory sensitivities
- Losing or forgetting things
- Starting and finishing jobs around the house
- How it feels when plans change
Specific examples are particularly useful. For example, “I often forget appointments unless they’re written in three different places” gives a clinician much more information than “I’m forgetful.”
School, college or work
Think about your experience in school, college, or work. This might include:
- Difficulty concentrating during lessons or meetings
- Missing deadlines
- Struggling with organising belongings
- Feeling exhausted after social interaction
- Finding group work difficult
- Needing explicit instructions
Parents may find old school reports particularly useful. Comments about attention, friendships, behaviour, anxiety, routines, or classroom participation can provide useful background information.
Friendships and relationships
Many people focus on work or school difficulties and forget about the social side of life.
Consider things such as:
- Difficulty maintaining friendships
- Feeling drained after social events
- Missing social cues
- Interrupting conversations
- Needing time alone to recover after spending time with others
- Finding conflict especially stressful
Childhood experiences
ADHD and autism are neurodevelopmental conditions, which means clinicians will ask about childhood as well as adulthood. You don’t need to remember every detail. Old reports, family memories, photographs, or conversations with parents, siblings, or relatives can often help fill in the blanks.
As you make notes, don’t worry about organising everything neatly. A list in your phone, a notebook, or several key bullet points is more than enough.
What to bring to an autism or ADHD assessment (a quick checklist)
Many people worry that they’ll turn up missing something important. But a good clinician will guide the conversation and ask follow-up questions throughout the assessment. Still, having a few key documents and notes available can make the process easier and help you provide a fuller account of your experiences.
You don’t need everything on this list. Bring whatever is available and relevant to you or your child.
Assessment preparation checklist
□ Completed pre-assessment questionnaires
□ Notes about current difficulties and day-to-day experiences
□ Examples from childhood that you would like to discuss
□ School reports, parents’ evening notes, or SEND documentation (if available)
□ Previous assessment reports or clinical letters
□ Information about current medication
□ Details of any mental health support you have received
□ Feedback from a partner, parent, family member, teacher, or someone who knows you well
□ Questions you would like to ask during the assessment
School reports can provide useful context
For children, school reports often contain information that parents may not think to mention during an appointment. Comments about attention, friendships, emotional regulation, classroom participation, organisation, sensory needs, or behaviour can all help build a broader understanding of a child’s experiences across different environments.
Adults may also find old reports useful if they still have access to them. Even brief comments can provide evidence of experiences that have been present since childhood.
You don’t need to remember everything
One of the biggest concerns people have before an assessment is forgetting something important. That’s why a list of examples, experiences, or topics you want to discuss can help take the pressure off. Many people find that writing things down beforehand makes it much easier to explain experiences that have become so familiar they barely notice them anymore.
Clinicians understand that recalling years of experiences in a single appointment isn’t easy. Notes are completely acceptable and can be a helpful part of the assessment process.
How to complete autism and ADHD assessment questionnaires
Assessment questionnaires often provide some of the most useful information before an appointment takes place. They give clinicians an early understanding of your experiences and help identify areas that need further discussion during the assessment.
Answer based on your typical experience
When completing questionnaires, think about what life is usually like rather than focusing on your best days. Most people have periods where things feel easier and periods where everything feels harder. Clinicians are interested in the experiences that occur consistently over time.
If you find yourself thinking, “I can do that, but only if I put huge amounts of effort into it,” include that context where possible.
Give examples when you can
A tick-box answer only tells part of the story. Examples help explain what a difficulty looks like in everyday life.
For example:
- Missing deadlines despite good intentions
- Feeling exhausted after social situations
- Becoming overwhelmed in busy environments
- Needing strict routines to get through the day
- Frequently losing important items
- Struggling to start tasks even when they are important
Ask someone who knows you well
Sometimes the people around us notice things that have become normal to us. Parents, partners, siblings, close friends, or teachers may be able to provide additional examples or remind you of experiences you’ve forgotten about. This can be particularly helpful when thinking about childhood experiences or behaviours that have been present for many years.
Don’t worry about finding the “right” answer
Many people become anxious about answering questionnaires correctly. But there are no perfect answers. The purpose of the questionnaire is to build an accurate picture of your experiences, strengths, challenges, and day-to-day life. Honest responses are far more useful than trying to work out what a clinician may be looking for.
If you’re unsure about a question, answer it as accurately as you can and make a note to discuss it during the assessment.
Remember that questionnaires are only one part of the assessment
Questionnaires provide useful background information, but they don’t determine the outcome on their own. Your assessment includes a detailed conversation with an experienced clinician, giving you the opportunity to expand on your answers, provide examples, and discuss experiences that may not fit neatly into a form.
How to prepare for an autism or ADHD assessment if you mask your difficulties
Many people spend years finding ways to cope with challenges before they ever consider an assessment. Calendars filled with reminders. Strict routines. Double-checking everything. Avoiding certain situations. Rehearsing conversations. Working longer hours than everyone else to stay on top of tasks.
These coping strategies can make difficulties less visible to other people. Sometimes they even make them less visible to you. As a result, people often come to their assessment thinking, “Maybe I’m making a fuss over nothing” or “Perhaps everyone finds this difficult.”
Think about the effort involved
Clinicians are interested in more than whether something gets done. They also want to understand how much effort it takes.
For example:
- Do you regularly stay late to finish work that colleagues complete during the day?
- Do you avoid social events because they leave you exhausted?
- Do you need multiple reminders to remember appointments?
- Do you spend hours preparing for situations that other people seem to manage naturally?
Consider what happens behind the scenes
Many people appear calm and capable to the outside world while dealing with significant stress, anxiety, overwhelm, or exhaustion. You may have developed strategies that allow you to manage everyday life successfully. These strategies are worth mentioning during your assessment.
Examples might include:
- Detailed routines
- Extensive note-taking
- Multiple alarms on your phone
- Reliance on family support
- Avoiding certain environments
- Planning conversations in advance
- Needing recovery time after social interaction
Write things down before the appointment
It is very common to remember important examples after the assessment has finished. Keeping notes in the days or weeks leading up to it can help prevent that. So whenever something happens that feels relevant, make a quick note on your phone. It could be a forgotten appointment, a sensory difficulty, a social misunderstanding, or a task that took far longer than expected.
Those real-life examples are often much easier to discuss than trying to remember years of experiences during a single conversation.
Be honest about both strengths and difficulties
Many people seeking an assessment have successful careers, strong relationships, academic qualifications, or busy family lives. Those achievements are important, and they don’t cancel out the challenges you’ve experienced along the way.
An assessment looks at your experiences as a whole. Sharing both strengths and difficulties helps clinicians build the most accurate understanding of you or your child.
How to prepare your child for an autism or ADHD assessment
Parents often spend weeks worrying about how their child will react to an assessment. Most children cope well when they know what to expect and feel reassured that there are no right or wrong answers. Essentially, the goal is to help them feel comfortable enough to be themselves.
Keep the explanation simple
The amount of information you share should match your child’s age and level of understanding. For younger children, something as simple as this is often enough:
“We’re going to meet someone whose job is to learn about how children think, learn, communicate, and experience the world.”
Older children and teenagers may want more detail. They often appreciate an honest explanation about why the assessment has been arranged and what it could help with.
Avoid turning it into a test
Children can become anxious if they think they are being assessed on their performance or behaviour.
Remind them that:
- They cannot pass or fail
- They do not need to prepare answers
- They can ask for clarification if they don’t understand something
- They should answer honestly
Many children relax considerably once they understand that nobody is expecting them to get anything right.
Stick to normal routines where possible
The days leading up to an assessment don’t need to look different from any other week. Regular sleep, familiar routines, and keeping the day relatively calm can help reduce anxiety.
Parents sometimes feel pressure to observe every behaviour or gather large amounts of information at the last minute. Most of the useful information will already come from the questionnaires, discussions, and supporting documents provided during the assessment process.
Let your child know what the day will look like
Children often feel more comfortable when they know what to expect.
You might explain:
- Who they will be speaking to
- Whether the appointment is online or in person
- How long it is likely to last
- When they can take breaks if needed
- What will happen afterwards
Simple, factual information is usually enough.
Bring any questions you have as a parent
Many parents focus entirely on preparing their child and forget that they may have questions too. So be sure to write them down beforehand. You may want to ask about the assessment process, reports, support options, school communication, or what happens next. Having those questions ready can help you leave the appointment feeling informed and reassured about the next steps.
What happens on the day of an autism or ADHD assessment?
One of the biggest sources of anxiety before an assessment is simply not knowing what to expect. That’s why we have a detailed post on exactly what happens during an ADHD or autism assessment here.
Most people feel more comfortable once they understand how the appointment works and what the clinician is trying to learn.
The assessment is a conversation. Try not to think of it as an exam. There are no right answers, trick questions, or behaviours that you are expected to demonstrate.
Your clinician will guide the discussion
You won’t be expected to remember everything without support. Clinicians ask structured questions designed to build a detailed understanding of your experiences, both now and throughout your life.
The discussion may cover areas such as:
- Childhood experiences
- Education and employment
- Friendships and relationships
- Daily routines
- Organisation and attention
- Communication
- Sensory experiences
- Emotional regulation
- Areas of strength and interest
If something important comes to mind later in the appointment, that’s completely fine. Conversations often trigger memories and examples that weren’t obvious at the beginning.
It is okay to take your time
Some people answer quickly. Others need time to think. You may want to refer to notes, ask for a question to be repeated, or pause before answering. All of that is completely normal. Clinicians understand that discussing years of experiences can take time.
You don’t need to hide your difficulties
Many people spend years trying to compensate for challenges, particularly in work, education, or social situations. An assessment is one of the few places where being honest about those experiences is genuinely helpful.
If a task feels difficult, say so. If something takes a huge amount of effort, explain that. If you have developed routines, reminders, coping strategies, or workarounds, mention them.
The more complete the information, the easier it is for the clinician to understand your experiences accurately.
Parents play an important role in children’s assessments
For child assessments, parents are often asked about developmental history, early childhood experiences, behaviour at home, school experiences, friendships, communication, and everyday routines. This information helps clinicians understand how a child functions across different environments and stages of development.
You don’t need to have every detail memorised. The information you’ve already gathered through questionnaires, reports, and notes will often provide much of the background needed.
The assessment is only one part of the process
Many people feel a sense of relief once the appointment begins. The pressure of wondering whether to seek an assessment has passed, and the focus moves to understanding your experiences and identifying the most appropriate next steps.
By the time the assessment takes place, you’ve already done much of the preparation through questionnaires, supporting information, and the notes you’ve gathered beforehand.
Preparing for life after an autism or ADHD assessment
Many people spend so long waiting for answers that they don’t stop to consider what they’ll do with the information once they have it.
For some, a diagnosis provides an explanation that brings years of experiences into focus. For others, the assessment points towards a different explanation or identifies additional areas where support may be helpful.
Either way, it’s about gaining a better understanding of yourself or your child.
A diagnosis can open the door to support
An autism or ADHD diagnosis may help you access support in different areas of life.
That could include:
- School support or educational adjustments
- Workplace accommodations
- Conversations about medication where appropriate
- Talking therapies
- Better understanding within relationships and families
- Practical strategies for everyday challenges
Many people also describe feeling a sense of relief from finally having an explanation for experiences they have struggled to put into words.
A diagnosis is the start of the next stage
An assessment provides information. What happens next depends on your circumstances, goals, and the support that feels right for you.
Some people want to learn more about how their brain works and make small adjustments to daily life. Others may benefit from structured support, therapy, workplace accommodations, educational guidance, or discussions around medication.
There is no single path that everyone follows.
What if you don’t receive a diagnosis?
Many people worry about this before an assessment. Even when a diagnosis is not given, the assessment process can still provide useful information about the difficulties you are experiencing and what support may be appropriate moving forward.
Understanding the next steps
One advantage of seeking an assessment through a provider that delivers ongoing support is that you don’t have to work out the next steps alone.
RTN provides post-diagnostic support alongside assessment services. Depending on individual circumstances, this may include discussions around therapy, medication pathways, or additional support following diagnosis.
For people who would benefit from talking therapies, RTN provides neurodivergent-focused CBT designed specifically for ADHD and autistic individuals. This gives patients access to continued support from the same wider organisation that carried out their assessment, helping create a more joined-up experience from diagnosis through to ongoing care.
How RTN supports you through the autism or ADHD assessment process
Preparing for an assessment can feel much easier when you know what support is available before, during, and after your appointment.
RTN provides private ADHD, autism, and combined assessments for children and adults. Once you’ve booked and purchased your assessment, you can start the private assessment process within 24 hours.
Before your appointment, you’ll complete pre-assessment questionnaires so your clinician has useful background information before they meet you. You’ll also have support from a dedicated Patient Advisor, who can explain the process, answer questions, and help you feel more prepared.
Assessments are carried out by experienced clinicians using recognised diagnostic tools, including ADOS, ADI-R, and DIVA where appropriate. RTN assessments are also carried out in a way that adheres to NICE guidelines.
After your assessment, you’ll receive a written report and guidance on next steps. Depending on your circumstances, this may include therapy, medication pathways, or further support following diagnosis.
This means you’re not left to work everything out alone once the assessment is complete. RTN can support you from the first stages of preparation through to post-diagnostic care.
You don’t need to prepare perfectly
You don’t need a perfect timeline of events, a folder full of documents, or answers prepared for every question. A few notes, some real-life examples, and completed questionnaires will usually provide more than enough information to begin the conversation.
The clinician’s job is to guide the assessment and gather the information they need. Your job is simply to share your experiences as openly and honestly as you can.
Whether the assessment is for you or your child, preparation can help you feel more confident walking into the appointment. Most importantly, it allows the focus to stay where it belongs: gaining a better understanding of the experiences that brought you here in the first place.
Ready to book an autism or ADHD assessment?
If you’re looking for answers, RTN provides private ADHD, autism and combined assessments for children and adults.
You’ll receive support throughout the process from a dedicated Patient Advisor, with assessments conducted by experienced clinicians using recognised diagnostic tools and approaches that adhere to NICE guidelines.
Book your assessment today or speak to our team if you’d like help choosing the right assessment pathway.