Adult ADHD Assessments

8 minute read • Last clinically reviewed: September 2026
Written by: Natasha Lansley-Bryant, BABCP Accredited Cognitive Behavioural Therapist

An adult ADHD assessment can help you understand long-standing difficulties with attention, organisation, restlessness or impulsivity. It provides an opportunity to explore your experiences carefully and consider whether ADHD may help explain patterns that have affected different areas of your life.

At Thinkwell Therapy, the assessment process is thorough, supportive and focused on you as an individual. It is not simply a questionnaire or a checklist. We take time to understand your present-day experiences, your early development and the wider factors that may be affecting you.

What is adult ADHD?

Attention Deficit Hyperactivity Disorder, usually known as ADHD, is a neurodevelopmental condition. This means it relates to how the brain develops and functions.

Figure 1: Understanding Adult ADHD

Adults with ADHD may experience difficulties involving attention, organisation, activity levels and impulse control. These difficulties can look different from one person to another.

Some people mainly experience inattentive symptoms, while others have more noticeable hyperactive or impulsive symptoms. Many experience a combination.

Possible signs of adult ADHD can include:

• Becoming easily distracted
• Frequently losing or misplacing things
• Forgetting appointments, tasks or conversations
• Finding it difficult to organise time and responsibilities
• Struggling to begin or complete tasks
• Procrastinating, even when something is important
• Feeling physically or mentally restless
• Interrupting or speaking before thinking
• Making quick or impulsive decisions
• Becoming overwhelmed by competing demands
• Experiencing strong emotional reactions
• Alternating between difficulty concentrating and periods of intense focus

Everyone occasionally experiences some of these difficulties. During an ADHD assessment, we consider how persistent the patterns are, whether they were present during childhood and the effect they have had across different parts of your life.

Why might someone seek an ADHD assessment?

Some adults begin considering ADHD after recognising similar traits in a child, relative, friend or colleague. Others may have struggled for years without understanding why everyday tasks seem to require so much effort.

You might consider an assessment if difficulties with attention, organisation, restlessness or impulsivity are affecting your:

• Work or education
• Relationships and family life
• Finances or household responsibilities
• Confidence and self-esteem
• Emotional wellbeing
• Ability to manage time and commitments
• Daily routines

For some people, reaching adulthood without an explanation has led to repeated criticism, frustration, or a feeling that they should try harder. An assessment can provide a more informed understanding of what has been happening.

ADHD in women

ADHD can sometimes be less obvious in women, particularly when inattentive symptoms are more prominent than visible hyperactivity.

Some women develop extensive ways to compensate for or mask their difficulties. They may appear organised or capable to other people while privately experiencing exhaustion, anxiety, overwhelm or persistent self-criticism.

Changes in responsibilities, work demands, parenthood or hormonal stages can make previously manageable difficulties harder to compensate for. An assessment considers the person’s whole experience rather than relying on a narrow or stereotypical picture of ADHD.

What happens during an adult ADHD assessment?

An adult ADHD assessment gathers information from several sources. No single questionnaire, test or conversation should be used on its own to confirm ADHD.

1. Initial information

Before the main assessment, you will be asked to provide information about the difficulties you are currently experiencing. You may also be asked to complete screening questionnaires.

These questionnaires provide useful information, but they do not provide a diagnosis on their own.

Figure 2: The Adult ADHD Assessment Process

2. Clinical interview

The main assessment includes a detailed clinical interview. This explores possible ADHD symptoms and how they affect everyday life.

We may discuss areas including:

• Attention and concentration
• Organisation and time management
• Restlessness and activity levels
• Impulsive decisions or behaviour
• Emotional regulation
• Work, education and relationships
• Daily responsibilities
• Physical and mental health

You will be able to explain your experiences in your own words. The aim is not to catch you out or require you to answer questions in a particular way.

3. Childhood and developmental history

ADHD begins during childhood, even when it was not recognised or diagnosed at the time. The assessment will therefore explore your early development and experiences at school and at home.

You may be asked about childhood concentration, behaviour, organisation, friendships and educational experiences. Old school reports or other records can sometimes help, but we understand these are not always available.

4. Information from someone who knows you

Where possible, we may request information from someone who knows you well. This might be a partner, parent, sibling or close friend.

They may be able to describe patterns they have noticed or provide information about your childhood. We recognise that not everyone has someone who can contribute, and we can discuss this during the assessment.

5. Considering the wider picture

Several conditions and experiences can produce difficulties that resemble or occur alongside ADHD. A careful assessment therefore considers your wider physical and mental health.

This may include exploring:

• Anxiety or depression
• Autism
• Trauma and difficult life experiences
• Sleep difficulties
• Substance use
• Learning differences
• Physical health conditions
• Current medication

This does not mean we are dismissing your difficulties. It helps ensure that the assessment reaches the most accurate and useful understanding possible.

What happens after the assessment?

Once we have considered all relevant information, we will explain the outcome clearly.

If the assessment indicates that you meet the diagnostic criteria for ADHD, we will discuss what the diagnosis means and consider appropriate recommendations and next steps.

If the criteria are not met, we will explain why and consider whether another explanation or form of support may be more helpful.

A written assessment report will set out the information considered, the clinical conclusions and any recommendations.

Recommendations may include:

• Psychological support
• ADHD-informed CBT
• Practical strategies for organisation and time management
• Workplace or educational adjustments
• Further assessment or specialist support
• Discussing medical treatment with an appropriately qualified prescriber

Receiving a diagnosis does not mean that you have to take medication. If medication is something you would like to explore, this would need to be discussed with an appropriate ADHD medical specialist.

How should I prepare?

You do not need to prepare perfect answers or remember every detail of your childhood.

Before the assessment, it may help to think about:

• The difficulties that prompted you to seek an assessment
• How these affect different parts of your life
• Whether similar patterns were present during childhood
• Previous mental health treatment or diagnoses
• Current medication and physical health conditions
• Any school reports or relevant records you still have
• Someone who may be able to provide additional information

You can make notes beforehand if you are worried about forgetting something important.

Adult ADHD assessment at a glance

You do not need a GP referral to arrange a private adult ADHD assessment with Thinkwell Therapy.

Before your appointment, you will be asked to complete a pre-assessment questionnaire. This helps us gather important background information and ensures we use the assessment time effectively.

The assessment usually takes 3 to 3.5 hours. You can complete it online through a secure video appointment or face-to-face, depending on your preference and availability.

The service includes:

• A pre-assessment questionnaire
• A comprehensive adult ADHD assessment lasting approximately three to three and a half hours
• The choice of an online or face-to-face appointment
• A full written assessment report
• A follow-up discussion about the outcome and appropriate next steps

After the assessment and written report, we can arrange a further discussion to explore suitable treatment options, practical coping strategies, and sources of ongoing support. If you wish to consider medication, you would need to discuss this with an appropriately qualified medical prescriber.

👩‍⚕️ Natasha’s Clinical Perspective

Many adults seeking an ADHD assessment have spent years working extremely hard to compensate for their difficulties. From the outside, they may appear successful and organised, while internally they feel overwhelmed, exhausted or confused about why everyday tasks can be so difficult.

A good assessment is not about reducing someone to a list of symptoms. It is about listening carefully, understanding their history and considering how different patterns have affected their life.

Whatever the outcome, the person should leave with a clearer understanding of themselves and practical guidance about what may help next.

Frequently asked questions

Can an online questionnaire diagnose ADHD?

No. Screening questionnaires can indicate whether further assessment may be appropriate, but they cannot diagnose ADHD on their own. A diagnosis requires a comprehensive clinical assessment.

Do I need a GP referral?

This depends on how you access the assessment. Contact Thinkwell Therapy to discuss the referral process and what information may be required.

What if I cannot remember much about my childhood?

This is common. Any information you can provide may be useful, but we understand that memories and childhood records are not always available. We can discuss your individual circumstances during the assessment.

Does someone else have to be involved?

Information from someone who knows you well can be helpful. However, not everyone has a suitable person available. Please discuss this with us rather than assuming it prevents you from having an assessment.

Can ADHD occur alongside anxiety or depression?

Yes. Adults with ADHD may also experience anxiety, depression or other mental health difficulties. The assessment considers how different symptoms and conditions may interact.

Will I definitely receive a diagnosis?

No assessment can guarantee a particular outcome. The purpose is to reach a careful, evidence-based clinical conclusion based on all available information.

Does an ADHD diagnosis automatically mean medication?

No. Some people choose to explore medication, while others prefer psychological, practical or lifestyle-based support. Medication must be initiated and monitored by an appropriately qualified ADHD medical specialist.

Can an assessment help even if ADHD is not diagnosed?

Yes. The assessment may still identify patterns, difficulties or alternative explanations that can guide appropriate support and future treatment.

Meet Natasha Lansley-Bryant

Natasha Lansley-Bryant is a BABCP-accredited Cognitive Behavioural Therapist and experienced adult ADHD assessor, with extensive clinical experience in the NHS. She takes a thorough, evidence-based approach, looking beyond questionnaires to understand each person’s symptoms, developmental history and experiences across different areas of life.

Natasha understands that seeking an ADHD assessment can feel both important and daunting. Her approach is warm, respectful and non-judgemental, giving you the time and space to describe your experiences openly. Whatever the outcome, she will explain her conclusions clearly and help you understand the most appropriate next steps.

Considering an adult ADHD assessment?

If you are wondering whether ADHD could help explain difficulties you have experienced, you are welcome to contact Thinkwell Therapy.

We can explain the assessment process, answer your initial questions, and provide information about availability, fees, and next steps.