Childhood developmental assessment (Developmental assessment / child development review)
An assessment that looks at how a child is developing across areas like talking, movement, play and social skills, to spot any areas where they may need extra help.
✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review
In short
- A developmental assessment looks at talking, movement, hand skills, play and social skills to see how your child is developing and where they may need support.
- It is a snapshot in time, not a label or a prediction — children develop at different rates and one assessment cannot tell you everything.
- Routine reviews happen on the NHS (including around 9–12 months and at 2–2½ years); a fuller specialist assessment can take more than one visit and a few weeks for reports.
- Acting early on a concern often helps most — but if your child suddenly loses skills they had, or you are seriously worried, ask for a review without waiting.
A plain-English summary. The detail — including risks and recovery — is below.
At a glance
A general guide. Your specialist will give you advice for your situation.
Reassurance when development is progressing as expected
A single developmental assessment is not the right route when a child is acutely unwell — that needs urgent medical care, not an assessment.
You usually get a sense of how the assessment went and what the main thoughts are, though not always a final answer.
A clear, written summary in plain English with practical next steps.
You usually get a sense of how the assessment went and what the main thoughts are, though not always a final...
A written summary or report may arrive. Referrals to other services (such as speech therapy) are set in motion.
Further appointments, tests or a multidisciplinary assessment may happen if needed. Support at nursery or school...
Development is reviewed over time, because the most useful information often comes from seeing how a child...
What is a childhood developmental assessment?
A childhood developmental assessment is a careful look at how your child is growing and learning compared with what is typical for their age. It usually covers several areas: communication and language, gross motor skills (big movements like sitting, walking and running), fine motor skills (using hands and fingers), problem-solving and play, and personal-social skills (how they relate to others). Hearing and vision are usually checked too, because problems there can affect development.
In the NHS, much of this happens through routine health and development reviews led by health visitors, including a review around 9–12 months and again at age 2 to 2½. Parents are often asked to fill in a questionnaire called the Ages and Stages Questionnaire (ASQ-3) beforehand. If there are concerns, a child may be referred for a fuller assessment by a community paediatrician, speech and language therapist, or a child development team.
An assessment is there to understand your child, not to label or judge them. It can reassure you that development is on track, or it can pick up an area where early help could make a real difference. Children develop at different rates, so one assessment is a snapshot, not a final verdict.
It is important to know what an assessment can and cannot do. It can describe how your child is doing now and flag areas to support or investigate. It usually cannot, on its own, give a precise diagnosis of conditions like autism or ADHD, predict exactly how your child will turn out, or replace getting to know your child over time.
Types, options & approaches
There may be different ways to do this. The right approach depends on the clinical question and your circumstances.
Routine review vs full specialist assessment
| Feature | Routine review | Specialist assessment |
|---|---|---|
| Who does it | Health visitor team | Paediatrician / therapists / psychologist |
| When | Set ages (e.g. 1 yr, 2–2½ yrs) | When concerns are raised |
| Length | Short appointment | Longer, sometimes several visits |
| Main aim | General check, reassurance, spotting concerns | Understand a specific difficulty in detail |
| Outcome | Advice or referral | Plan, support, sometimes a diagnosis |
Both are part of normal care. A routine review may lead to a specialist assessment; it does not mean something is wrong.
Preparing for your test
- A parent or carer who knows the child well should attend, as your everyday observations are central to the assessment.
- If asked, complete the Ages and Stages Questionnaire (ASQ-3) or any other forms honestly before the visit.
- Bring the child's red book (personal child health record), a list of any concerns, and notes on what your child can and cannot yet do.
- Bring reports or letters from nursery, school or other professionals, and any previous hearing or vision results.
- Bring a comfort item, snack and a familiar toy so your child is relaxed and shows their usual behaviour.
- Note any family history of developmental, hearing, speech or learning differences.
- Tell the team about anything affecting the day, such as tiredness, illness, hunger or a recent upset, as these change how a child performs.
What happens
The clinician will usually start by asking about your pregnancy, birth, your child's health, and how they are doing at home and (if relevant) at nursery or school. They will ask what your child can do — for example how they communicate, move, play and interact.
They will then watch and gently interact with your child, often through play, to see skills directly. Hearing and vision may be checked or arranged. For a fuller assessment, more than one professional may be involved, sometimes across more than one visit.
The assessment is designed to feel friendly and unhurried. Children behave differently in a strange room, so a good clinician takes this into account and relies on your account as well as what they see. You can ask questions at any point.
At the end you should get an idea of what was found, what happens next, and whether any referrals, further tests or a follow-up are planned. A written summary or report often follows.
Is this test right for me?
A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.
May not be suitable if…
- A single developmental assessment is not the right route when a child is acutely unwell — that needs urgent medical care, not an assessment.
- A one-off assessment is not enough on its own to diagnose autism or ADHD, which need a fuller, multidisciplinary process over time.
- An assessment cannot substitute for hearing or vision testing if a sensory problem is suspected.
- It is the wrong tool if the real need is practical support that can simply be started, rather than more testing.
Delay or rearrange if…
- Your child is unwell, very tired, hungry or upset on the day, as this can make results misleading.
- A recent major change or upset (such as a house move or bereavement) is affecting behaviour.
- Important information (such as nursery reports or previous results) is not yet available.
- Hearing or vision has not been checked and a sensory problem is suspected — this may need doing first.
Alternatives to discuss
- Routine NHS health visitor reviews and the ASQ-3 questionnaire for general monitoring
- Waiting and reviewing over time when a concern is mild, rather than testing immediately
- A focused single-discipline assessment (for example speech and language) if that is the main concern
- Direct support at home or nursery for a specific skill, without formal assessment
- Hearing and vision testing first if a sensory cause is likely
Before you decide
Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.
What matters most to me?
Think about symptoms, daily life, work, caring responsibilities, sport, fertility, travel, appearance and anxiety — the right choice depends on your priorities, not just the medical facts.
What are all my options?
Ask about waiting, monitoring, medicines, rehabilitation, a smaller or larger procedure, a different test, NHS referral, or a second opinion where that would help.
What would make me pause?
Active infection, pregnancy, unstable medical problems, smoking, medicines that increase bleeding, poor support at home, or feeling pressured are all reasons to slow down and get tailored advice.
What happens if I do nothing today?
For some problems, waiting is safe; for others, delay can make treatment harder. A good consultation should explain the trade-off in plain English.
Benefits
- Reassurance when development is progressing as expected
- Early identification of areas that may need support, when help often works best
- A clearer understanding of your child's strengths as well as any difficulties
- A plan and signposting to the right services (such as speech therapy or specialist clinics)
- Hearing and vision problems can be picked up, as these can affect development
- A starting point for getting support at nursery or school if needed
Risks & complications
- Your child not showing their usual skills in an unfamiliar setting, so results under-estimate them
- Worry or anxiety for parents while waiting for feedback or reports
- Findings that are uncertain and need watchful follow-up rather than a clear answer
- Needing further appointments or tests to reach a fuller picture
- A concern raised that turns out, with time, to be within the normal range (a false alarm)
- A real difficulty being missed at a single visit because development changes over time
- Disagreement between settings (home vs nursery) that needs sorting out
- Over-labelling a young child based on one snapshot
- A serious underlying medical or neurological condition being found that needs urgent attention
The biggest limitation is that any single assessment is a snapshot. Children develop unevenly, and a quiet or tired child can perform below their true ability. Ask how confident the clinician is, what could change the picture, and when your child should be reviewed again. If you ever feel your concerns are being dismissed, you can ask for another opinion.
Published figures to discuss
Developmental assessment does not have meaningful 'complication rates'. The important uncertainties are about accuracy: a child can perform below their ability on the day, a single visit can both raise false concerns and miss real ones, and findings can change as a child grows. Numbers from screening tools vary widely with the age, setting and tool used, so they are not quoted here.
| Figure | Reported range | How to interpret it | Source / confidence |
|---|---|---|---|
| False alarm from a single assessment | Recognised | Tiredness, anxiety, shyness, illness, language exposure or unfamiliar setting can make a child perform below their usual level. | Guide sourcesClinical context |
| False reassurance | Recognised | A child can appear broadly on track at one visit while language, social communication, hearing or motor concerns emerge later. | Guide sourcesClinical context |
| Hearing or vision problem missed | Common reversible contributor | Hearing and vision should be considered early when speech, attention or learning concerns are present. | Guide sourcesClinical context |
| Delay to early support | Clinically important | A label is not always needed before referral to speech therapy, physiotherapy, portage or early-years support. | Guide sourcesClinical context |
These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.
What happens afterwards
There is no physical recovery from a developmental assessment. 'Afterwards' is mainly about understanding the findings, getting any report, and starting any support or referrals.
- Feeling a mix of relief and worry while you wait for reports
- Wondering whether your child 'performed' as they really are — this is very common
- Realising the picture becomes clearer over weeks and months, not in one appointment
- Being asked to try simple activities at home to support a particular skill
Aftercare
- Read any report and ask the team to explain anything you do not understand.
- Keep doing the everyday play, talking and reading that support all areas of development.
- Follow up on any referrals and keep a note of appointment dates and contacts.
- Share the findings (with your consent) with nursery or school so support can be joined up.
- Make sure any hearing or vision checks that were advised actually happen.
- Note any new concerns or any loss of skills and report these promptly.
- Keep your child's reviews and vaccinations up to date as part of overall health.
- ASQ-3 or other questionnaires completed
- List of your specific concerns written down
- Red book (personal child health record) packed
- Nursery/school comments or reports gathered
- Previous hearing and vision results to hand
- A familiar toy, snack and comfort item
- Questions you want answered noted
⚠ Get urgent help if…
- Your child loses skills they previously had (for example stops talking, walking or using words) — seek advice promptly
- By around 18 months, no clear words, not pointing, or not responding to their name
- Not making eye contact, smiling back, or showing interest in other people
- Floppiness, stiffness, or always using one side of the body much more than the other
- Concerns about hearing (not turning to sounds) or vision (not following faces or objects)
- Difficulty breathing, a non-blanching rash that does not fade under a glass, a child who is very drowsy, floppy or will not wake, or a seizure — call 999
- You feel something is seriously wrong with your child — trust your instinct and seek help
Who to contact: your clinician, clinic or test provider first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.
General guidance — it doesn't replace the specific advice your specialist gives you.
Results & realistic expectations
A good outcome from an assessment is a clearer, honest picture of how your child is developing, with practical next steps. That might be reassurance, simple advice, a referral, or the start of more detailed assessment. Some children are given a diagnosis; many are not, and instead have areas to support and review.
An assessment cannot promise how your child will develop in the future, and a 'normal' result does not rule out a difficulty appearing later. The most useful information often comes from following development over time, so be wary of anyone offering a quick, final label after a single short visit.
Development changes quickly in early childhood, so the findings of an assessment have a limited shelf life. A result from one age may need revisiting as your child grows, especially if concerns continue or new ones appear. Plans should be reviewed regularly rather than treated as fixed.
Related tests, treatments or support
Developmental assessment is often combined with hearing and vision testing, speech and language assessment, and sometimes blood or genetic tests when a medical cause is being considered. Where autism or ADHD is being explored, a wider neurodevelopmental assessment with several professionals may be arranged.
Follow-up & long-term care
Follow-up depends on what is found. It may be a single review to check progress, ongoing input from therapists or a paediatrician, or coordination with nursery or school. You should be told who is responsible for your child's care, how to contact them, and when the next review is.
- Keep up everyday talking, reading, singing and play, which support all areas of development
- Attend follow-up reviews and therapy sessions as arranged
- Keep hearing and vision under review if there were any concerns
- Update nursery or school as your child's needs change
Repeat, follow-on and what comes next
- Re-assessment over time is normal and often more useful than one visit, because development changes quickly.
- An uncertain result usually leads to review or a fuller assessment rather than a firm label.
- Plans should be revisited as your child grows or as new concerns appear.
Ask what happens if the result is unclear or needs repeating, and what is included if further tests or follow-up are needed.
What good aftercare looks like
- A clear, written summary in plain English with practical next steps.
- A named contact and a way to ask questions after the appointment.
- A realistic plan for review over time, not a one-off verdict.
- Joined-up sharing of findings (with your consent) with the NHS, nursery or school.
- Clear safeguarding-aware advice on when and how to seek urgent help if your child becomes unwell or loses skills.
What affects the cost
Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:
- Length and depth of the assessment, and how many visits are needed
- Whether several professionals are involved (for example paediatrician, psychologist and therapists)
- Use of standardised, scored developmental tests
- Reports, letters and any liaison with nursery or school
- Additional tests arranged, such as hearing, vision, blood or genetic tests
- Follow-up appointments and any onward referrals
- Who will carry out the assessment and their qualifications
- What is included (history, observation, standardised tests, hearing/vision)
- Whether a written report and feedback session are included
- Cost of any additional tests or further appointments
- What happens if the result is unclear and further assessment is advised
- How findings can be shared with the NHS, nursery or school
- Cancellation and rebooking policy
On the NHS? Routine development reviews and clinically needed specialist assessments are provided on the NHS; some families choose a private assessment for speed or choice, but it should be carried out by suitably qualified professionals.
You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.
Consent traps and marketing red flags
These are not small details. They are often where patients lose choice, time to reflect, or realistic expectations.
Consent traps
- Being given a firm diagnosis after a single short visit without wider assessment over time.
- No clear explanation that a quiet or tired child may under-perform.
- Not being told who will see the report or how it may be used at nursery or school.
- No discussion of what happens if the result is normal, abnormal or inconclusive.
- Pressure into extra paid tests without a clear reason.
Marketing red flags
- 'Same-day' or 'guaranteed' diagnosis of autism or ADHD from one appointment.
- Promises to predict your child's future abilities or school success.
- Selling expensive packages of tests without an individual clinical reason.
- Downplaying the role of routine NHS reviews, hearing and vision checks.
- Claiming an assessment alone will 'fix' a difficulty without ongoing support.
Choosing a specialist safely
- Check the specialist is on the GMC Specialist Register for this area.
- Make sure they work at a CQC-registered service, and look for membership of the relevant Royal College or professional body.
- You're entitled to time to consider and to have your questions answered before you agree — the specialist who looks after you should explain it, not a salesperson.
- Be wary of pressure: time-limited offers or deposits taken before you've had time to think are red flags, not bargains.
- You're entitled to your total cost in writing — including any follow-up — before you decide.
Questions to ask your medical professional
Take this to your consultation. A good specialist will welcome every one of these.
- Which areas of my child's development are you assessing, and how?
- How confident are you in what you found, and what could change the picture?
- What will this assessment change — what happens next if it is reassuring, concerning, or unclear?
- Do you recommend hearing or vision testing, or any other tests?
- When should my child be reviewed again, and who do I contact with concerns?
- Who will see the report, and how can I share it with nursery or school?
- What can I do at home to support my child while we wait?
- Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
- Will you be the specialist who carries out my test, and who looks after me afterwards?
- What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
- What does a realistic result look like — and what can this test not achieve?
- What are my options, including waiting, doing nothing for now, or choosing a different approach?
- Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
- What is the total cost in writing, including any follow-ups, and how much time do I have to decide?
Frequently asked questions
Does a developmental assessment mean something is wrong with my child?
Can I get a developmental assessment on the NHS?
My child was quiet and wouldn't perform — does that matter?
Will the assessment give a diagnosis like autism or ADHD?
How long do reports take?
What can I do while I wait for support?
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How we made this page
Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →
Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.
Sources & standards: NHS — Baby and child health and development reviews GOV.UK — Healthy Child Programme: health visiting (ages 0 to 5) NHS — Children's developmental milestones / play and learning NICE CKS — Child health surveillance and promotion
Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.
Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.
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