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Diagnostic Assessment for Dyslexia and other SpLDs

  • Dyslexia assessments are undertaken by qualified dyslexia specialists at the individuals/ school or workplace, or in our Grantham location either on week days or at a weekend.

  • A dyslexia assessment is undertaken in a single session and takes between 3-4 hours to complete. The report, including diagnosis, is delivered within 7 days.

  • The assessment is conducted privately and all results are strictly confidential and will only be shared with the client. 

  • The cost for a dyslexia diagnostic assessment is £380.

  • Full payment must be received prior to the assessment or screening

Answers to frequently asked questions about dyslexia assessments can be found below:

For more information about diagnostic assessments, or to make a booking, please either send an email to, or complete the form below. Someone will respond in 24 hours.

Thank you for your enquiry

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FAQ assessments & screenings

Answers to frequently asked questions about diagnostic assessments:

What is a Dyslexia diagnostic assessment?
A full diagnostic dyslexia assessment assesses a person’s literacy related skills and cognitive profile and aims to determine the precise nature of the dyslexic related difficulties experienced by an individual. A diagnostic assessment is a very detailed process often taking between 3 and 4 hours to administer. 
The assessor will:
•    discuss the individual’s background, previous educational experiences and current needs.
•    carry out a series of tests designed to measure performance across a range of activities
•    identify a pattern of difficulties and strengths which will allow the assessor to determine whether dyslexia is present.
At the discretion of the specialist assessor, the possible co-occurrence of associated specific learning difficulties such as dyscalculia, Dyspraxia/ DCD (Developmental Co-ordination Disorder) or Visual Stress may also be explored during the diagnostic assessment.
The assessment will identify problem areas as well as areas of particular strength and expertise, so it is both subjective and positive in character.

How does a Dyslexia assessment differ from a screening?
A screening is an initial check to see if there is a possibility of dyslexia. A full diagnostic assessment will state if there is the presence of dyslexia or not. A full diagnostic assessment is required in order to definitively diagnose dyslexia in an adult (18+) and the diagnosis can be used as evidence to access more support services.

What can I do with the results of a Dyslexia diagnostic assessment?
A detailed report which highlights the person’s strengths and weaknesses, states whether the evidence points to dyslexia and provides recommendations for support. In this way, a person can learn more about themselves and discover the best ways of learning and working. In addition, having a report containing a dyslexia diagnosis will provide evidence of need and acts as a passport in order to obtain and access support services, such as accommodations, extra time, and extra help in the classroom. For adults, it  provides evidence needed to either apply for Disabled Student’s Allowance as a student or determine reasonable accommodations in the workplace.

In which locations can Dyslexia Tree perform dyslexia full diagnostic assessments?
•    Nottinghamshire
•    Leicestershire
•    Lincolnshire
•    Northamptonshire
•    West Midlands


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