If your child has been referred for a developmental assessment, you may wonder whether you will receive a diagnosis. The assessment looks at how your child communicates, learns, moves, plays, interacts and manages everyday activities, helping identify areas where they may need support.
A developmental assessment may identify global developmental delay when a young child has significant delay affecting two or more developmental areas, while conditions such as autism, ADHD, developmental language disorder and developmental co-ordination disorder generally require condition-specific diagnostic assessment. The developmental assessment can still provide important information that helps determine which pathway is appropriate.
What Can a Developmental Assessment Actually Identify?
A developmental assessment helps you understand how your child’s communication, movement, learning, play, social skills and everyday abilities are developing. It can identify areas where your child may need extra support and may also highlight signs of developmental delay or a possible neurodevelopmental condition.
However, identifying a concern does not always mean giving a diagnosis straight away. Your child may need a more specific assessment for conditions such as autism, ADHD, speech and language difficulties or developmental co-ordination disorder before a diagnosis can be confirmed.
What a Developmental Assessment May Identify
| Finding or condition | What a general developmental assessment can do | Is further specialist assessment usually needed? |
| Developmental delay / GDD | Identify a pattern of delayed skills across one or more developmental areas. Global developmental delay (GDD) may be used when a young child has significant delay affecting two or more developmental areas. | Further assessment may be needed to investigate the cause or plan support. |
| Autism | Identify developmental features that suggest autism should be considered. | Yes. A specific autism diagnostic assessment is required. |
| ADHD | Identify concerns involving attention, activity levels, impulsivity and everyday functioning. | Yes. ADHD should be diagnosed by an appropriately qualified specialist following a full assessment. |
| Developmental language disorder | Identify persistent language difficulties and whether they appear relatively specific or part of wider developmental needs. | Usually requires detailed speech and language assessment. |
| Learning disability | Identify significant difficulties with learning and everyday functioning that require further evaluation. | Assessment of intellectual ability and adaptive functioning may be needed before a learning disability can be confirmed. |
| Dyslexia | Raise concerns about persistent reading, spelling or written-language difficulties. | Yes. A dyslexia assessment is usually undertaken by an educational psychologist or specialist teacher rather than a doctor. |
| Developmental co-ordination disorder | Identify persistent motor and co-ordination difficulties. | Usually requires a norm-referenced motor assessment and appropriate clinical assessment. |
| Possible medical, genetic or neurological cause | Identify features suggesting that further medical investigation may be useful. | Further investigations or specialist assessment may be recommended to look for an underlying cause, although a specific cause is not always identified. |
Does Your Child’s Age Affect What Can Be Diagnosed?
Your child’s age can affect how confidently a diagnosis can be made, particularly when they are very young. You may initially hear terms such as global developmental delay, while professionals continue to monitor how your child’s communication, learning, movement and independence develop.
Some conditions also have age-related diagnostic considerations. For example, DCD is not usually diagnosed before age 5, while some language difficulties can be identified earlier, so your child may receive support and have their development reviewed as they grow.
Can an Assessment Diagnose Developmental Delay?
Yes. A developmental assessment can identify developmental delay when your child is taking longer than expected to develop skills such as communication, movement, learning or independence. If significant delays affect two or more areas, professionals may use the term global developmental delay (GDD). GDD describes the pattern of a child’s development rather than necessarily explaining its underlying cause.
Finding a delay does not always explain why it is happening, so your child may need further assessment or targeted tests. Recognising the delay can still help you access appropriate support based on your child’s current needs.
Can a Developmental Assessment Diagnose Autism?
A developmental assessment may identify signs that suggest your child could be autistic, particularly if you notice differences in social communication, interaction or behaviour. However, identifying possible autistic features during a general developmental assessment is not the same as making an autism diagnosis. A specific autism diagnostic assessment considers your child’s developmental history, social communication and interaction, behaviour and information from relevant settings and professionals.
If autism is suspected, you may be referred for a specialist assessment that considers information from you, nursery or school and other professionals. A single feature, such as delayed speech or disliking noisy places, does not automatically mean your child is autistic.
Can ADHD Be Identified Through a Developmental Assessment?
A developmental assessment may highlight signs of ADHD, such as ongoing difficulties with attention, high activity levels or impulsive behaviour. However, a general developmental assessment does not by itself diagnose ADHD. NICE states that ADHD should only be diagnosed by a specialist psychiatrist, paediatrician or other appropriately qualified healthcare professional with training and expertise in ADHD diagnosis, following a full clinical and psychosocial assessment. Symptoms should cause impairment and be present in two or more important settings, such as home and school.
If ADHD is suspected, you may be referred for a more detailed assessment that considers how your child manages at home and school. The clinician will also consider whether another developmental, emotional or medical condition could better explain their difficulties.
Can Speech and Language Difficulties Be Identified?
Speech and language difficulties are a common reason for parents to discuss their child’s development with a healthcare professional. You may notice that your child talks later than expected, uses fewer words or finds it difficult to understand spoken language.
A speech and language therapist can assess how your child understands and uses language, communicates socially and produces speech sounds. Your child may also have a hearing check, as hearing difficulties can affect communication, and further assessment may be suggested if their needs are broader.
What Is Developmental Language Disorder?
Developmental language disorder (DLD) involves persistent difficulties understanding or using spoken language that have a meaningful impact on everyday communication, learning or social participation. The term DLD is used when the language disorder is not associated with a known differentiating biomedical condition. DLD can still occur alongside conditions such as ADHD, dyslexia or developmental co-ordination disorder.
DLD is based on your child’s overall language pattern rather than one test result. A developmental assessment can also help show whether their communication difficulties are more specific or part of wider developmental needs.
Can a Developmental Assessment Identify a Learning Disability?
A developmental assessment can highlight signs of a learning disability, which involves reduced intellectual ability together with difficulties managing everyday activities. It is different from a specific learning difficulty such as dyslexia, and younger children may initially be described as having global developmental delay.
As your child grows, further assessment may consider intellectual ability and adaptive functioning, meaning how they manage practical, social and everyday demands, to determine whether the criteria for a learning disability are met. This can help clarify your child’s needs and guide appropriate healthcare, educational and practical support.
What About Dyslexia and Other Specific Learning Difficulties?
Specific learning difficulties can affect particular skills even when your child’s overall intellectual ability is not reduced. Dyslexia, for example, mainly affects reading, spelling and written language, and these difficulties may become clearer once your child starts school.
A developmental assessment may highlight a possible learning difficulty but does not necessarily provide a formal dyslexia diagnosis. A formal dyslexia assessment is usually carried out by an educational psychologist or appropriately qualified specialist teacher, with support from the school and SENCO.
Can Developmental Co-ordination Disorder Be Diagnosed?
If your child has ongoing difficulties with movement and co-ordination, you may hear about developmental co-ordination disorder (DCD), also known as dyspraxia. You might notice problems with running, balancing, catching, handwriting, dressing or using cutlery, even when other areas of development are progressing well.
Diagnosing DCD requires more than identifying motor difficulties during a general developmental assessment. NHS guidance states that diagnosis is usually made by a paediatrician, often working with an occupational therapist, and includes a norm-referenced assessment of the child’s motor skills.
Can the Assessment Find Social Communication Difficulties Without Autism?
Yes. Children can have significant communication or social interaction difficulties without meeting the diagnostic criteria for autism. These difficulties can affect social interaction even when the main concern is related to language development.
A developmental assessment looks at communication alongside play, behaviour, flexibility and the wider developmental picture. Even without an autism diagnosis, you can still receive useful guidance and support based on what your child finds difficult.
Can a Developmental Assessment Suggest an Underlying Medical, Genetic or Neurological Condition?
Sometimes, a developmental assessment can highlight signs that suggest an underlying medical, genetic or neurological condition. Your clinician may consider your child’s health history, development, growth, physical examination, family history and any loss of previously acquired skills when deciding whether further investigation is needed. A clear loss of previously acquired motor, language or social skills should be discussed promptly with a healthcare professional rather than simply waiting for routine developmental follow-up.
Your child may be offered genetic or other tests if their individual developmental pattern suggests they could be useful. Not every child needs scans or blood tests, and sometimes no specific cause is found, but your child’s developmental needs can still be recognised and supported.
Can a Child Have More Than One Developmental or Related Condition?
Your child can have more than one neurodevelopmental condition, and some children also have co-existing neurological, communication or learning difficulties. For example, autism can occur alongside ADHD, a learning disability, language difficulties or epilepsy.
If one diagnosis does not explain everything you are noticing, further assessment may still be useful. Looking at your child’s full developmental profile can help professionals provide support that meets their different needs.
What Can a Developmental Assessment Not Diagnose by Itself?
A general developmental assessment can identify an overall pattern of strengths and difficulties, but it is not a substitute for every condition-specific diagnostic assessment. Some conditions, such as ADHD, autism, dyslexia, developmental language disorder or DCD, may require more specialised assessments that look at specific areas in greater detail.
Your clinician may identify a possible explanation for your child’s difficulties and recommend the appropriate specialist pathway. This does not mean the assessment has failed; taking time to understand your child’s needs can lead to a more accurate diagnosis and appropriate support.
Myth vs Fact
| Myth | Fact |
| A developmental assessment will always give my child a diagnosis. | Some assessments identify a clear developmental pattern, while others show that more information, monitoring or a condition-specific assessment is needed. |
| If autism or ADHD is mentioned, my child has been diagnosed. | A general developmental assessment may raise the possibility of autism or ADHD, but both require an appropriate diagnostic assessment before the diagnosis is confirmed. |
| Global developmental delay tells you what caused my child’s difficulties. | GDD describes significant delay across two or more developmental areas. Further assessment may be needed to investigate why the delay has occurred. |
| A paediatrician can diagnose dyslexia during a developmental assessment. | Dyslexia assessment is usually carried out by an educational psychologist or appropriately qualified specialist teacher rather than a doctor. |
| Every child with motor difficulties has DCD. | Motor difficulties can have several possible explanations. DCD diagnosis requires appropriate clinical assessment and standardised assessment of motor skills. |
| My child cannot receive support until there is a diagnosis. | Support can often be based on identified needs while assessment continues, although services and referral criteria vary locally. |
Who Might Be Needed to Reach a Diagnosis?
The professional involved will depend on your child’s developmental concerns, as no single specialist diagnoses every condition. You may see a community paediatrician for broader concerns, while speech and language therapists, occupational therapists or physiotherapists may help assess specific difficulties.
Other professionals may contribute depending on the question being investigated. For example, speech and language therapists assess language difficulties and may diagnose DLD when appropriate; psychologists may assess intellectual and adaptive functioning; educational psychologists or specialist teachers usually carry out dyslexia assessments; and DCD assessment commonly involves a paediatrician working alongside an occupational therapist. Autism and ADHD usually follow dedicated diagnostic pathways rather than being confirmed from a general developmental assessment alone.
UK Guidance Note: Diagnosis and Support in England
There is no single NHS developmental pathway that is identical everywhere in England. The professional or service involved depends on your child’s age, the main area of concern and local referral arrangements. Autism and ADHD have specific diagnostic pathways, while speech and language, motor, learning or educational concerns may involve different health or education professionals.
Educational support can be based on identified needs rather than a medical diagnosis alone. The SEND Code of Practice emphasises identifying the full range of a child or young person’s needs and basing support on a clear understanding of those needs. If your child is struggling at nursery or school, you can therefore discuss practical support with the setting and SENCO while diagnostic assessment is continuing.
Does Your Child Need a Diagnosis Before Receiving Support?
Not always. Depending on your child’s needs and local pathways, some support may begin before a final diagnosis is reached. Communication, motor or educational support can be based on identified difficulties while further diagnostic assessment is continuing.
Support at nursery or school can also be based on what your child needs rather than a medical label alone. A diagnosis can help explain ongoing difficulties and guide further support. While assessment is continuing, you can ask your child’s nursery, school or relevant service what support can be put in place based on their identified needs.
What Happens If the Assessment Does Not Find a Clear Diagnosis?
You may not always receive a clear diagnosis after a developmental assessment, particularly if your child is young or their difficulties do not yet fit a specific condition. The team may need more information from you, nursery or school, or may recommend an assessment with another specialist.
Not receiving a diagnosis does not mean that your child’s difficulties do not matter or that support is unnecessary. You can ask what has been identified, what support is recommended and whether your child’s progress should be reviewed as their development and needs change.
Key Takeaways
- A developmental assessment looks at your child’s overall pattern of communication, learning, movement, play, interaction and everyday functioning.
- Global developmental delay may be identified when significant delay affects two or more developmental areas, but this does not necessarily explain the underlying cause.
- Autism and ADHD generally require dedicated diagnostic assessments rather than being confirmed from a general developmental assessment alone.
- Developmental language disorder, dyslexia and developmental co-ordination disorder also require assessment focused on the relevant area of difficulty.
- Some children have more than one neurodevelopmental, communication, learning or neurological condition.
- Further medical or genetic investigations are considered only when your child’s developmental pattern, history or examination provides a clinical reason.
- Depending on local pathways and your child’s needs, practical or educational support may begin before a final diagnosis is reached.
FAQs
1. What conditions can a developmental assessment identify?
A developmental assessment can identify developmental delays and highlight signs of conditions such as autism, ADHD, developmental language disorder and developmental co-ordination disorder. Some conditions require additional specialist assessments before a diagnosis can be confirmed.
2. Can a developmental assessment diagnose autism?
A developmental assessment can identify features that may suggest autism, but a specific autism diagnostic assessment is usually needed to confirm the diagnosis. This considers developmental history, social communication, interaction, behaviour and information from different settings.
3. Can ADHD be diagnosed through a developmental assessment?
A developmental assessment may identify behaviours associated with ADHD, such as persistent difficulties with attention, impulsivity or activity levels. A formal ADHD diagnosis requires a specialist assessment that considers symptoms, impairment and behaviour across different settings.
4. Can developmental delay be diagnosed?
Yes. An assessment can identify delays in areas such as communication, movement, learning, play or everyday independence. When significant delay affects two or more developmental areas in a young child, the term global developmental delay may be used.
5. Can speech and language difficulties be diagnosed?
A developmental assessment can identify communication difficulties and determine whether further speech and language assessment is needed. A speech and language therapist may then assess conditions such as developmental language disorder or specific speech difficulties in greater detail.
6. Can a developmental assessment identify a learning disability?
A developmental assessment may identify significant difficulties with learning, communication and everyday functioning that require further evaluation. Further assessment of intellectual ability and adaptive functioning may be needed to establish whether a child has a learning disability.
7. Can dyslexia be diagnosed through a developmental assessment?
A general developmental assessment may raise concerns about dyslexia or another specific learning difficulty, particularly when a child’s progress in reading, spelling or written language differs from their wider abilities. A specialist educational assessment is usually required for a formal dyslexia diagnosis.
8. Can developmental co-ordination disorder be diagnosed?
A developmental assessment can identify persistent difficulties with co-ordination, balance, handwriting, dressing or other motor skills that may suggest developmental co-ordination disorder. A more detailed motor assessment is usually needed to confirm the diagnosis and rule out other possible causes.
9. Can a child have more than one developmental condition?
Yes. Developmental and neurodevelopmental conditions can overlap. For example, a child may have autism alongside ADHD, communication difficulties, epilepsy or a learning disability, so professionals may assess the wider developmental profile rather than focusing on one condition alone.
10. Does a child need a diagnosis before receiving support?
Not always. Support can often begin when a specific developmental need has been identified, even if further diagnostic assessment is still taking place. Depending on your child’s needs and local pathways, this may include speech and language support, occupational therapy, physiotherapy or adjustments at school.
Final Thoughts: Understanding Your Child’s Developmental Profile
A developmental assessment can help you understand your child’s strengths, difficulties and whether further specialist assessment or support may be helpful. If you’re considering an autism assessment for children, you can get in touch with us at London Paediatric Clinic.
A diagnosis is not always made during the first assessment, but you should come away with a clearer understanding of your child’s needs and the next steps that may support their development.
References:
- Alder Hey Children’s NHS Foundation Trust (2025) Global Developmental Delay (GDD). Page last reviewed 19 May 2025. Available at: https://www.alderhey.nhs.uk/conditions/patient-information-leaflets/global-developmental-delay-gdd/
- National Institute for Health and Care Excellence (NICE) (2017) Autism spectrum disorder in under 19s: recognition, referral and diagnosis. Clinical guideline CG128. Published 28 September 2011; updated 20 December 2017. Available at: https://www.nice.org.uk/guidance/cg128
- National Institute for Health and Care Excellence (NICE) (2019) Attention deficit hyperactivity disorder: diagnosis and management. NICE guideline NG87. Published 14 March 2018; updated 13 September 2019. Available at: https://www.nice.org.uk/guidance/ng87
- Bishop, D.V.M., Snowling, M.J., Thompson, P.A., Greenhalgh, T. and the CATALISE-2 Consortium (2017) ‘Phase 2 of CATALISE: a multinational and multidisciplinary Delphi consensus study of problems with language development: Terminology’, Journal of Child Psychology and Psychiatry, 58(10), pp. 1068–1080. Available at: https://pubmed.ncbi.nlm.nih.gov/28369935/
- NHS (2025) Learning disabilities. Page last reviewed 24 September 2025. Available at: https://www.nhs.uk/conditions/learning-disabilities/
- NHS (2026) Dyslexia in children. Page last reviewed 11 March 2026. Available at: https://www.nhs.uk/conditions/dyslexia-in-children/
- NHS (2023) Developmental co-ordination disorder (dyspraxia) in children – Diagnosis. Page last reviewed 8 March 2023. Available at: https://www.nhs.uk/conditions/developmental-coordination-disorder-dyspraxia/diagnosis/
- Department for Education and Department of Health and Social Care (2024) SEND code of practice: 0 to 25 years. Statutory guidance. Published 11 June 2014; updated 12 September 2024. Available at: https://www.gov.uk/government/publications/send-code-of-practice-0-to-25
- Royal College of Speech and Language Therapists (RCSLT) (no date) DLD – questions on diagnosis and support. Available at: https://www.rcslt.org/speech-and-language-therapy/clinical-information/developmental-language-disorder/dld-diagnosis-and-support/