Adults with dyslexia are slower than controls on single-digit arithmetic, with a larger multiplication-minus-subtraction reaction-time difference, even after controlling digit identification speed¶
Claim · All claims
Evidence · 1 study · associationalr2·q3·i3large
Currency · newest study 2010 · not yet checked against its sources · not reviewed by a person
Subclaims¶
Reading the evidence codes
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q3 i3 Individuals with dyslexia were slower than controls on single-digit arithmetic, and the difference between multiplication and subtraction was larger in the dyslexia group. → Bert De Smedt 2010
Evidence¶
Bert De Smedt 2010¶
Bert De Smedt, Bart Boets. (2010). Phonological processing and arithmetic fact retrieval: Evidence from developmental dyslexia. Neuropsychologia, 48, 3973–3981. https://doi.org/10.1016/j.neuropsychologia.2010.10.018
q3 · i3 · associational · r2
Repeated-measures ANOVA (operation within-subject, group between-subject) on reaction times in the 25 dyslexia vs 25 control study. The group main effect was also significant (F(1, 48) = 24.31, p < .01, ηp² = .34), and group differences remained when speed of digit identification was covaried (F(1, 47) = 9.46, p < .01, ηp² = .17).
"There was also a significant Group× Operation interaction ( F(1, 48) = 10.55, p < .01, /DC1p2 = .18), suggesting that the difference between multiplication and subtraction was larger in participants with dyslexia than in controls."
Discussion¶
Related Claims¶
- Simple subtraction in adults relies heavily on strategy use, which disadvantages participants under limited working memory resources — related
- Adults use a mix of retrieval and procedural strategies in single-digit arithmetic, with retrieval more frequent in multiplication and procedures more frequent in subtraction — related
- Adults with dyslexia execute both retrieval and procedural arithmetic strategies more slowly than controls — related
- Adults with developmental dyslexia are slower than controls at speeded digit identification — related
- Adults with developmental dyslexia use arithmetic fact retrieval less frequently than matched controls during single-digit multiplication and subtraction — related
- Children with DD show slower reaction times than TD children during arithmetic problem solving, with no operation-specific RT effect — related
- Multiplication employs fact retrieval processes to a larger extent than addition and subtraction, though the regressive difference is slight — related
- Individual records revealed contrasting specific disabilities within the same pupil across arithmetic operations — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
dyslexia-slower-single-digit-arithmetic-rt |
title |
Adults with dyslexia are slower than controls on single-digit arithmetic, with a larger multiplication-minus-subtraction reaction-time difference, even after controlling digit identification speed |
description |
Adults with dyslexia are slower than controls on single-digit arithmetic, with a larger multiplication-minus-subtraction reaction-time difference, even after controlling digit identification speed |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2010 |
generated |
by process:wiki-ingest on 2026-10-16 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — bert-de-smedt-2010 |
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