PoorAF children show a significant problem-size effect in multiplication RTs, with a marginally significant stronger problem-size influence than controls¶
Claim · All claims
Evidence · 1 study · associationalr2·q3
Currency · newest study 2008 · checked against its sources 2026-10-20 (automated, 1 of 1 entry) · 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 i? In the multiplication selection task, the PoorAF group was slower than controls (2914 ms vs 1822 ms), small multiplications were processed faster than medium ones, and the group-by-problem-size interaction was marginally significant. → Mussolin 2008
Evidence¶
Mussolin 2008¶
Mussolin, C. and Noël, M-P. (2008). Specific Retrieval Deficit from Long-Term Memory in Children with Poor Arithmetic Facts Abilities. The Open Psychology Journal. https://doi.org/10.2174/1874350100801010026
q3 · i? · associational · r2
An ANOVA with problem size and group on multiplication task RTs. Both main effects were highly significant, and the interaction was marginally significant (F(1, 34) = 4.016, p = .053), reflecting a stronger problem-size influence on the PoorAF group (difference of 1091 ms) than on controls (difference of 553 ms).
"The main effects of group (F(1, 34) = 37.307, p < .001) and problem size ( F(1, 34) = 12.372, p = .001) were both highly significant. Children in the PoorAF group were slower than control children (2914 ms and 1822 ms, respectively)"
Discussion¶
Learner Variables¶
- Arithmetic Fact Retrieval — predictor: learners who differ on it differ in outcomes
- Long-Term Memory — predictor: learners who differ on it differ in outcomes
Related Claims¶
- PoorAF and control children do not differ in error rates on the multiplication task, indicating the problems were not too difficult — related
- PoorAF children do not differ from controls on tasks retrieving semantic information (words, objects, countries) or verbal routines (proverbs) — related
- Fourth graders with poor arithmetic-fact abilities (PoorAF) and matched controls did not differ on a perceptual shape-matching speed task — related
- Children with poor arithmetic fact abilities are significantly slower than matched controls only on the multiplication selection task — related
- Fourth graders show the typical problem-size effect in multiplication, with slower and less accurate responses to large than small problems — a broader claim this one bears on
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
pooraf-problem-size-effect-multiplication |
title |
PoorAF children show a significant problem-size effect in multiplication RTs, with a marginally significant stronger problem-size influence than controls |
description |
PoorAF children show a significant problem-size effect in multiplication RTs, with a marginally significant stronger problem-size influence than controls |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2008 |
source_checked |
2026-10-20 |
generated |
by process:wiki-ingest on 2026-10-17 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — mussolin-2008 |
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