A Comprehensive ADHD assessment designed to bring clarity.
Not a guesswork. A careful, clinically grounded process to understand your experiences in depth.
Dr Sonney Gullu-McPhee, Psy.D, MA, MSc, BSc (Hons)
Chartered Clinical Psychologist · HCPC & BPS Registered
ISST Certified Advanced Schema Therapist
Many adults who come to me have spent years sometimes decades trying to understand why certain things feel harder than they seem to for others.
They are often capable, high-functioning, and managing on the surface, yet exhausted by the effort it takes to keep up.
If you’ve been wondering whether ADHD might explain some of these long-standing patterns, this assessment is designed to give you a clear and thoughtful understanding of your experiences.
- Start with a free 15-minute consultation to see if this is the right step for you
AT A GLANCE
Age Range
Adults aged 17+
Location
Petersfield, Hampshire
Report
Comprehensive written report
Format
In-person or online
Full Assessment
2 hours
Fee
£1650
IS THIS RIGHT FOR YOU?
You may benefit from an ADHD assessment if you:
- have struggled with focus or organisation for years
- feel overwhelmed by everyday responsibilities
- suspect ADHD may explain long-standing patterns
- want a clear, professional understanding of what’s going on
A careful, comprehensive assessment designed to understand your experiences in depth.
If ADHD may be part of your experience, this assessment provides a clear, structured understanding of what’s going on and what to do next. This is not a quick checklist or test-based diagnosis, but a thoughtful, evidence-based process focused on understanding your experiences across life stages and areas of functioning.
WHAT YOU WILL RECEIVE
- A thorough, evidence-based assessment informed by NICE guideline NG87 for ADHD
- A comprehensive written report you can use with your GP, employer, or insurer
- Personalised recommendations tailored to your specific profile
- Honest, clear feedback, whether or not ADHD is diagnosed
- Guidance on next steps, including medication referral where relevant
The aim is for you to leave with a clearer understanding of how your experiences have developed over time, how they affect your day-to-day functioning, and a sense of direction about what to do next.
• Full ADHD assessment (2 hours):
£1650
A brief, no-obligation call to talk through your concerns, answer your questions, and explore whether an assessment feels like the right next step for you.
An in-depth session exploring your current difficulties, background history, and whether proceeding to a full assessment is clinically appropriate. This session alone often brings significant clarity.
A detailed clinical assessment exploring your experiences across childhood and adulthood, including patterns of attention, organisation, and emotional regulation over time. This includes a structured clinical interview, developmental history, and consideration of how your difficulties present across different areas of life, including work, relationships, and day-to-day responsibilities.
The assessment also considers how these patterns occur across different settings, in line with recognised diagnostic standards. Where appropriate, standardised measures may be used to support clinical understanding, alongside information from multiple sources where available.
I will provide a clear explanation of the outcome, along with a comprehensive written report and personalised recommendations, including guidance on medication pathways where appropriate.
Thoughtful clinical expertise — not a high-volume diagnostic service
Conducted by an experienced Chartered Clinical Psychologist
This is a comprehensive, in-depth assessment, designed to go far beyond a brief or standardised evaluation. I hold a Doctorate in Clinical Psychology and have extensive postdoctoral training in comprehensive psychological assessment
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My training in the United States included work across educational and medical settings, with a strong focus on diagnostic clarification and complex case formulation. This included advanced training in cognitive and personality assessment, integrated with clinical expertise to develop a clear and balanced understanding of each individual.
I personally carry out and interpret every assessment.
Rigorous, multi-method assessment
Careful consideration of the full picture
ADHD does not exist in isolation. Where other factors such as anxiety, depression, trauma, or autism may overlap or better explain your experiences, these will be carefully considered and reflected clearly in the report.
Thoughtful clinical expertise — not a high-volume diagnostic service
Attention and focus
- Struggling to stay focused, especially on tasks that don’t interest you
- Your mind drifting or switching quickly between thoughts
- Finding it hard to finish tasks, even when you’ve started with good intentions
Organisation and daily life
- Feeling disorganised or overwhelmed by everyday responsibilities
- Losing track of important things like keys, appointments, or deadlines
- Difficulty planning or breaking tasks into manageable steps
Time and follow-through
- Chronic procrastination or leaving things until the last minute
- Underestimating how long things will take
- Feeling like you are always trying to catch up
Motivation and task initiation
- Struggling to get started on tasks, even when they feel important
- Needing pressure or urgency to begin
- Feeling stuck or unable to follow through despite good intentions
Emotional experience
- Feeling easily overwhelmed or mentally overloaded
- Emotional ups and downs or sensitivity to stress
- Frustration with yourself for not doing things the way you “should”
Restlessness and mental activity
- A busy or constantly active mind
- Difficulty switching off or relaxing
- Feeling internally restless, even if you don’t appear hyperactive
Many people come to an ADHD assessment after years of trying to understand themselves.
This process is designed to provide clarity, not judgement.
Structured, comprehensive, and grounded in recognised UK clinical standards.
My approach to ADHD assessment is structured, comprehensive, and grounded in recognised UK clinical standards.
Rather than relying on a single test or checklist, I take a formulation-led approach, drawing together your history, current experiences, and the context in which your difficulties occur.
The assessment is based on a detailed clinical evaluation of your experiences over time, across different settings, and within the context of your developmental history.
The aim is to develop a clear and balanced understanding of your individual profile, considering both strengths and challenges, and whether ADHD or other factors may best explain your experiences.
Comprehensive Psychological Profile
WHAT YOU WILL RECEIVE
For some people, the goal is not to identify a specific diagnosis, but to gain a deeper and more complete understanding of themselves.
You may feel that your patterns, emotional responses, or life experiences are complex, longstanding, or difficult to fully make sense of, even after previous therapy or attempts to find answers.
If you are looking for a structured and in-depth understanding of your personality, emotional patterns, and how your experiences fit together, I also offer a different kind of comprehensive psychological profiling assessment.
A comprehensive psychological assessment designed to develop a clear and integrated understanding of your psychological functioning.
This is a formulation-led process focused on understanding the whole person, rather than assessing for a specific condition or diagnosis.
The assessment may include, where appropriate, the use of standardised psychometric measures alongside clinical expertise to build a detailed psychological profile.
Clear answers to common concerns
How is this different from an NHS assessment?
NHS waiting lists for adult ADHD assessment currently run to several years in many areas. This service offers the same clinical rigour with no waiting list, a more thorough process, and a detailed written report suitable for use with employers, academic institutions, or your GP.
Will the report be shared with anyone?
No. Your report is confidential and shared only with you. You decide who to share it with. A shorter summary letter can also be provided if needed.
What if I don't meet the criteria for ADHD?
This is more common than people expect, and it does not mean the process has been wasted. You will leave with a clear understanding of what is affecting you and what to do next.
How long does the report take?
The written report is typically provided within two weeks of your assessment session.
Can I explore medication if ADHD is diagnosed?
Yes. If ADHD is diagnosed and medication feels appropriate, a referral to a medical professional will be provided.
Are online assessments as thorough as in-person ones?
Yes. Remote assessments follow the same clinical process and depth, and many clients find them more comfortable and convenient.
BOOK A CONSULTATION
Take the first step towards understanding your experiences.
Appointments are limited each month to ensure every client receives the depth of assessment they deserve.