Evidence map›Paper›PMID 39996533›Full record

ArticleJournal of child psychology and psychiatry, and allied disciplines2025

Toward a consensus on dyslexia: findings from a Delphi study.

Julia M Carroll, Caroline Holden, Philip Kirby, Paul A Thompson, Margaret J Snowling, Dyslexia Delphi Panel

Abstract read
In one paragraph

Article in Journal of child psychology and psychiatry, and allied disciplines, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

20 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Julia M CarrollSchool of Education, University of Birmingham, Birmingham, UK.
Caroline HoldenSpLD Assessment Standards Committee (SASC).
Philip KirbySchool of Education, Communication and Society, Kings College London, London, UK.
Paul A ThompsonSchool of Social Policy and Society, University of Birmingham, Birmingham, UK.
Margaret J SnowlingDepartment of Experimental Psychology, University of Oxford, Oxford, UK.ORCID 0000-0003-0836-3861
Dyslexia Delphi Panel

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDyslexia is one of the most common neurodevelopmental disorders. There have been many definitions over the past century, and debate continues as to how dyslexia should be defined. This debate contributes to confusion and misinformation. We move beyond the debate by establishing areas of consensus among a wide range of experts.

methodsWe conducted a Delphi study with a panel of dyslexia experts, including academics, specialist teachers, educational psychologists, and individuals with dyslexia, asking them for their views on a set of key statements about dyslexia. We carried out two survey rounds, in each case accepting statements with greater than 80% consensus and reviewing and revising other statements using feedback from the expert panel. This was followed by discussion with a subset of the panel around a few statements with marginal consensus.

resultsForty-two statements were ultimately accepted. In the current paper we review those statements that pertain to a definition of dyslexia, demonstrate how they align with the research literature, and build on previous definitions of dyslexia.

conclusionsThere was considerable consensus in our expert panel that dyslexia is a difficulty in reading and spelling, associated with multiple factors, and that it frequently co-occurs with other developmental disorders. It was agreed that difficulties in reading fluency and spelling are key markers of dyslexia across different ages and languages. We conclude with a proposed new definition of dyslexia.

Indexed as

ConsensusDyslexiaAdultChildDelphi TechniqueHumansDyslexianeurodevelopmental disordersreading disorderspecific learning difficultiesspelling disorder

Identifiers

PMID39996533
PMCPMC12198935

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.