What is the difference?
A dyslexia screener estimates whether a child shows indicators associated with dyslexia and may warrant further investigation. A diagnostic assessment is a fuller evaluation by a suitably qualified professional that considers educational history, literacy attainment and relevant processing skills before reaching a reasoned conclusion and recommendations.
Four facts to know
A high-risk screening result is not a diagnosis.
A low-risk result does not automatically explain away persistent difficulties.
Diagnostic assessment uses multiple sources of evidence.
Both screening and assessment should lead to practical support, not simply a label.
When screening may be useful
Screening can help a school or family decide whether to investigate further and can highlight areas for immediate support. Its value depends on the quality of the tool, appropriate administration and careful interpretation.
When diagnostic assessment may be useful
A diagnostic assessment may be appropriate when difficulties are persistent, a fuller explanation is needed, or formal evidence is required for a specific purpose. The assessor should explain whether the child’s age, teaching history and available evidence make the timing appropriate.
Questions to ask about a result
What exactly did the screener measure?
What other explanations were considered?
What support should begin now?
Would fuller assessment change an important decision?