At all ages, children with developmental dyscalculia perform significantly lower than controls in magnitude comparison tasks using symbolic numbers¶
Claim · All claims
Evidence · 1 study · reviewr2·q2
Currency · newest study 2011 · not yet checked against its sources · not reviewed by a person
Subclaims¶
Reading the evidence codes
q is the design tier, i the impact, n the sample, and the kind with its r
the rigour judged within that kind: what each code means.
This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.
q2 i? Across studies of children aged 6 to 14, DD children show impaired symbolic number magnitude comparison relative to controls. → Noël M-P and Rousselle L 2011
Evidence¶
Noël M-P and Rousselle L 2011¶
Noël M-P and Rousselle L (2011) Developmental changes in the profiles of dyscalculia: an explanation based on a double exact-and-approximate number representation model. Front. Hum. Neurosci. 5:165. https://doi.org/10.3389/fnhum.2011.00165
q2 · i? · review · r2
The authors' narrative synthesis of studies comparing DD and control children on symbolic versus non-symbolic number comparison, ordered by age in Table 1. The review reports that "at all ages, DD children perform significantly lower than controls" on symbolic comparison; no effect sizes are printed.
"First, at all ages, DD children perform significantly lower than controls in the magni- tude comparison tasks using symbolic numbers."
Discussion¶
Learner Variables¶
- Learning Disabilities and Developmental Differences — predictor: learners who differ on it differ in outcomes
- Number Sense — outcome: instruction changes it
Related Claims¶
- The authors hypothesize DD children's first deficit is dysfunction in building the exact representation of symbolic numbers, with reduced ANS acuity as a consequence rather than a cause — related
- DD children's deficit in non-symbolic number magnitude processing appears only in studies of older children (10 years and above), not younger ones — related
- Measures of the magnitude representation (ratio and distance effects) do not discriminate children with DD from matched controls — reports the opposite
- Adults with dyscalculia perform the number comparison task as accurately as controls but respond significantly more slowly — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
dd-symbolic-magnitude-comparison-deficit-all-ages |
title |
At all ages, children with developmental dyscalculia perform significantly lower than controls in magnitude comparison tasks using symbolic numbers |
description |
At all ages, children with developmental dyscalculia perform significantly lower than controls in magnitude comparison tasks using symbolic numbers |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2011 |
generated |
by process:wiki-ingest on 2026-10-17 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — noël-m-p-and-rousselle-l-2011 |
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