How to Choose the Right Private ADHD or Autism Assessment

Written on: 28 April 2026

Choosing a private assessment is a significant decision. Here is what a good ADHD or autism assessment should include, what to ask before you book, and how to tell whether a provider is likely to offer a careful, professional process.

If you are considering an ADHD or autism assessment for yourself or your child, it is normal to feel unsure.

Private ADHD or Autism assessments can vary a great deal. One provider may sound reassuring but say very little about how the process works. Another may promise speed but leave you wondering how thorough the assessment will really be.

When you are spending a significant amount of money, that difference matters. A good assessment should not feel rushed, vague, or opaque. It should leave you with a clearer understanding of what is going on as well as next steps, whether a diagnosis is made or not.

wordcloud using neurioviersity terms such as Autism, ADHD and AUDHD

Start with the right question

For most people, the first question is naturally: Does my child have autism? or Do I have ADHD?

But there is another question that matters just as much: Is this assessment likely to give us a careful and useful understanding of what is going on?

A good assessment is not just about confirming or ruling out a diagnosis. It should help make sense of the wider picture, including strengths, difficulties, patterns over time, and the settings in which those difficulties show up. In some cases, that also means considering whether ADHD, autism, or both may need to be explored.

This matters because ADHD and autism can overlap, and some people may be experiencing both, sometimes referred to as AuDHD. Some traits can also look like other difficulties. Someone who seems distracted may be dealing with anxiety, sensory overload, sleep problems, stress, or something else entirely.

A child who seems withdrawn, overwhelmed, or out of step socially may be autistic, but they may also be dealing with anxiety, sensory overwhelm, low mood, or a pattern of stress that needs to be understood properly.

What to look for in a provider

1. A process that is thorough, not rushed

A good assessment should allow enough time to understand the person properly.

That does not mean it needs to drag on. It does mean it should not rest on a brief appointment or a handful of questionnaires. Questionnaires can be useful, but on their own they are not enough.

A provider should be able to explain clearly what the assessment involves and why.

2. Qualified clinicians with relevant experience

It is reasonable to ask who will carry out the assessment and what their qualifications are.

You are not being difficult if you want to know whether the clinician is trained and experienced in assessing ADHD, autism, or both. This matters even more when the presentation is complex, or when traits may overlap with anxiety, trauma, speech and language difficulties, sensory differences, or emotional regulation problems.

It is also worth asking whether more than one clinician may contribute to the assessment, or whether conclusions are reviewed within a multidisciplinary team. That can make the outcome more balanced and better considered.

A good provider should be able to explain who is involved, what their role is, and how decisions are made.

3. A Process that looks at the whole picture

A sound assessment does not rely on one source of information.

It should look at patterns over time, how difficulties show up in different settings, and whether there may be overlapping needs. It should ask about daily life, including school, work, relationships, emotional wellbeing, sensory experiences, attention, organisation, routines, and coping strategies.

The aim is not simply to collect symptoms. It is to understand the person in context.

4. Direct contact with the person being assessed

A thorough assessment should involve meeting the person being assessed. That is true whether the assessment is for a child, a teenager, or an adult. Good clinicians learn a great deal from direct contact, not only from what someone says, but from how they communicate and describe their experience.

Forms and questionnaires can support an assessment. They should not replace it.

5. A clear explanation of what happens afterwards

Before you book, you should know what the outcome will look like.

Will you receive verbal feedback? A written report? Clear recommendations? Advice about next steps?

A good assessment should leave you with something useful and practical. Even if the outcome is that you or your child does not meet the criteria for ADHD or autism, you should still come away with a clearer understanding of what may be causing the difficulties and what kind of support might help.

Therapist playing with child as part of Neurodiversity Assessment

Learn more about our assessment process

What a thorough assessment may include

The exact process can vary, and not every assessment will look identical. But a thorough assessment often includes several parts.

There may be questionnaires completed in advance, so the clinician has background information before the appointment. There should be a detailed clinical interview, with time to talk through current concerns and longer-term patterns.

A developmental history is also important. For children, that means building up a picture of development over time. For adults, it means looking back across the lifespan to understand what was present earlier on, not only what is happening now.

There may also be direct observation or a structured assessment, depending on the questions being explored. It is important to gather information from someone who knows the person well to gain insights from a different perspective. Sometimes more than one clinician may be involved.

That kind of process is more likely to produce a careful and reliable outcome than one that rests on a single appointment alone.

black and white graphic of the word "assessment"

What may differ for Adults and Children

The same principles apply to both adults and children. The assessment should be careful, thoughtful, and based on more than one source of information.

Some parts of the process may differ.

For children and young people, school information is often important. A child may seem settled in one setting and struggle in another. Teacher questionnaires, school feedback, and sometimes school observation can all add valuable context.

For adults, the assessment may focus more on lifelong patterns and on how difficulties have shown up over time in education, work, relationships, and daily life. Where possible, it is useful to gather information from someone who has known the person for many years, especially in relation to childhood.

The assessment pathway may also differ depending on the question being explored. In some cases, the concerns point more clearly towards ADHD or autism. In others, it makes more sense to consider both together rather than treating them as two separate questions.

Questions to ask before you book

If you are unsure how to compare providers, asking these questions can help:

Who will carry out the assessment, and what are their qualifications?
What does the assessment process involve?
Will you consider ADHD, autism, and overlapping needs?
If the picture is less clear, will you consider whether both ADHD and autism need to be assessed together?
How do you gather developmental history?
Will the person being assessed be seen directly?
For children, how is school information included?
For adults, do you look at lifelong patterns and background history where possible?
What will we receive at the end of the assessment?
Will there be clear recommendations or next steps?
If I am not sure a full assessment is needed, is there a preliminary stage I can take first?

A good provider should be able to answer these questions clearly. If the answers are vague or leave important gaps, it is worth asking a few more questions before you book.

If you are unsure, start there

Many people are not yet ready to commit to a full diagnostic assessment. They may still be trying to work out whether assessment is the right next step at all.

That is a sensible position to be in.

Sometimes the most useful first step is a chance to talk through concerns in more depth, look at the pattern of difficulties, and consider whether a full assessment is likely to be helpful. That can stop people rushing into a process before they are ready and make the next decision much clearer.

It can also help clarify the shape of the question. For some people, the issue is whether ADHD, autism, or both need to be explored further.

How Shore’s assessment process works

At Shore Psychology, ADHD and autism assessments are designed around exactly these principles.
We use a staged process, which with a Preliminary Assessment, to help clarify whether a full ADHD assessment, autism assessment, or combined assessment is likely to be helpful.
If a full assessment is needed, the process includes questionnaires in advance, detailed clinical interviews, developmental history, direct observation, school information for children, an interview with someone who knows you well for adults and multidisciplinary discussion before conclusions are reached. The aim is to give you a careful answer and clear next steps.

What a good assessment should leave you with

A good assessment should leave you with more clarity, not more confusion.

Whether the outcome is a diagnosis, a different explanation, or a recommendation for further support, the process should help you understand what is going on and what to do next.

That is what makes an assessment worth having: not simply a label, but a careful answer that helps life make more sense.

If you are unsure whether a full assessment is the right next step, Shore Psychology offers a Preliminary Assessment for £240 for adults, children and young people. It is designed to help clarify whether ADHD, autism, or both should be explored further, so you can decide on the next step with more confidence.

Book a Preliminary Assessment