The reading deficit profile of children with comorbid RDMD is additive relative to isolated RD and MD¶
Claim · All claims
Evidence · 1 study · quant-synthesisr2·q3·i2medium
Currency · newest study 2023 · 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.
q3 i2 In reading outcomes, the comorbid group's deficit (Hedges' g = 0.69) approximates the sum of the RD (0.51) and MD (0.15) deficits, pointing to additivity. → Nurit Viesel-Nordmeyer 2023
Evidence¶
Nurit Viesel-Nordmeyer 2023¶
Nurit Viesel-Nordmeyer, Julia Reuber, Jörg-Tobias Kuhn, Kristina Moll, Heinz Holling, Christian Dobel. (2023). Cognitive Profiles of Children with Isolated and Comorbid Learning Difficulties in Reading and Math: a Meta-analysis. Educational Psychology Review. https://doi.org/10.1007/s10648-023-09735-3
q3 · i2 · quant-synthesis · r2
Meta-analytic group comparisons of reading outcomes across the 74 included studies, with pooled Hedges' g values of 0.51 (C-RD), 0.15 (C-MD), and 0.69 (C-RDMD) that "pointed to an additive effect for the cognitive profile of children with RDMD".
"the overall effect sizes of group comparisons in reading outcomes (cf. Table 5) for C-RD (0.51), C-MD (0.15), and C-RDMD (0.69) pointed to an additive effect for the cognitive profile of children with RDMD"
Discussion¶
Related Claims¶
- The math deficit profile of children with comorbid RDMD is additive: it equals the sum of the deficits of isolated RD and MD groups — related
- Children with comorbid RDMD are significantly more impaired than children with isolated RD or MD in math, reading, and executive function outcomes — related
- In reading-related outcomes, group differences involving RD or RDMD are largest for reading tasks and phonological processing and smallest for RAN — related
- Group differences in math skills between LD and comorbid groups are more pronounced in symbolic than non-symbolic math tasks — related
- Executive function deficits in comorbid RDMD show some evidence of under-additivity, especially in inhibition, shifting, and updating — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
rdmd-reading-deficits-additive |
title |
The reading deficit profile of children with comorbid RDMD is additive relative to isolated RD and MD |
description |
The reading deficit profile of children with comorbid RDMD is additive relative to isolated RD and MD |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2023 |
generated |
by process:wiki-ingest on 2026-10-19 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — nurit-viesel-nordmeyer-2023 |
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